Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JPS4841702 September, 1972--Patent office director Yukio Miyake-& invention address United States 22-Tok state Ri-A-Booth Street-1-9th (name 1y Tal · VV Yakka M, jlF application Person-address American congregation-2-2-州 state Sugane Kuta de-[phase] Japan Patent Office 1 published patent publication ■ Japanese Patent Application Laid-Open No. 48-44702 title 4 channel stereo sound V-stem (1) (1) Transmit four channels of program information in a three-dimensional sound relationship using a main carrier frequency-modulated n with the first signal in the jilyL number band C2 that limits the maximum frequency. In the frequency spectrum, a first set of @ waves 70 extending from the lowest frequency to the highest frequency region is generated 'f' B7: second signal (−, C ′ ′) ′ c suppression carrier 1 ′ ′ 1 Width modulated n first subcarrier. 'The same subcarrier as the first subcarrier which is carrier wave amplitude modulated by the sixth signal to generate a second set of sidebands extending from the minimum frequency of the frequency spectrum to the maximum frequency domain, but in quadrature C: Some second subcarrier. The $ 1 ° W higher than the maximum frequency of the $ 11 signal! I2 set of sideband minimum frequency. A pilot frequency generator having a frequency suitable for a spectral region bounded by a maximum frequency limit of the first signal and a minimum frequency limit of the first set of second sidebands. A filtering means for limiting the minimum frequency of the modulation product (wdnjat tol product) developing from the sixth subcarrier to a value higher than the maximum frequency appearing in the first and second set of sidebands from the sixth subcarrier In accordance with the second signal in relation to the amplitude modulation n. 4 signals included in C2 among 7n et al. And distributed in a scheduled manner. Information from a signal source having four stereophonic relationships, a main carrier that is frequency modulated by the pilot frequency 1 ≦ 二 2 The energy distribution from the modulation of the 1J3 subcarrier ≦ 2 energy distribution is characterized by limiting the lower sidebands; amplitude modulation operating on the first and second sets of sidebands and the sixth subcarrier characterized in that product. A four-channel stereo sound system that is characterized by being capable of transmitting and receiving signals in four separate threedimensional sound relationships. EndPage: 1 • 4 channel information represented by LP% LI, RF 09-05-2019 1 and R1, respectively, where n is this information. The following relationship first signal == L, + L, + R, + R. 2 Claims DETAILED DESCRIPTION OF THE INVENTION The present invention is a new and improved broadcast system. In particular, four separate stereophonic relationships C; frequency-modulated broadcast systems with certain audio frequency (audio frequency) input / outputs o Broadcast or recorded audio and other elements C 2 realistic listening It is well recognized that entertainment 眸 can often be substantially increased by providing different loudspeakers C; multiple separate channels or audio feeds, so that the two-channel stereophonic system becomes obsolete Many record boards and magnetic tape recording media are broadcasted according to the established standard. A widely adopted and widely standardized type of two-channel stereophonic sound system is disclosed in U.S. Pat. No. 3,122,610 issued Feb. 25, 1964. The n utilizes a first frequency band in which the main carrier is modulated with the sum of the left (Z) and right (R) channels. This dominant transmission is frequency modulated at the sidebands of the 58 KHz suppressed subcarrier which is amplitude modulated with the difference between the left (L) and right (R) channels. The pilot signal is In order to give a reference for the local reproduction of the subcarrier and to give an indication of the presence of the stereophonic sound signal, in the receiver 受 信 =. 191 in the air gap between the two frequency bands! It is given as Jz. This highly successful system, is completely compatible with the monophonic mono-frequency modulation broadcast system of the prior art (C 雫 -tihla). It is now recognized that there are many advantages to a two-channel system C two-channel three-dimensional sound system that is realistic and increases listening entertainment by comparison. For example, if the sound 1 'of a large concert hall is played &: specials; 0 its surrounding C: in the case where the sound reaches the listener from many directions. Most of this sound is reflected, so it is time-delayed to form an important part of the listening experience-rt, v Introduce 04 channel stereophonic music is recorded on magnetic tape, good It is reproduced through the speaker system having the characteristic T. In addition, four-channel stereophonic music utilizing two separate stations, which are assigned different central carrier frequencies, limits 1M broadcasts. It is important that the four-channel stereophonic system be completely compatible (Ctnpat # b1g) with many of the monophonic and two-channel stereophonic devices present. If complete monophonic and twochannel stereophonic sound information is provided to this device, the present C's established sum and difference signals and the present code; the established 191JIz pilot signal is applied to the four-channel system. It must be integrated. Thus, the information necessary to destroy the jIC2 existing stereophonic sound channel into 4 channels C is established-rL must be superimposed on the 2-channel stereophonic sound 09-05-2019 2 jamming signal. It is not possible to generate an out-of-band radiation (otbt-of-one-Tadiatim) that is difficult to receive (Do not know how this goal is achieved. EndPage: 2 pseudo (pzgutLo) Alternatively, many three-dimensional sound receivers now exist, creating what is called a hybrid four-channel output. This is achieved by two ordinary stereo human can matrixes at the receiver, where ≦; one hour late to produce four inputs t each of which is different from the other six inputs And loudness (achieved with the addition of joutlxya, there are no four separate inputs. There are four artificially created four inputs, and the relationship between the two pairs of loudspeakers is in accordance with the preselected scheme (forytblα) when the receiver is built. Some known systems to be determined enjoy using a matrix of four audio inputs at the transmitter), but only two channels are transmitted al (= therefore, they are not Similarly, in the Vibrid system G2 as well, the 4 channel of information is not broadcasted by the transmitter C nie, so that the receiver can detect this much information 1: the device is not @ such 4 2 The four currently known loudspeaker receivers, which include a transmitter and at least one receiver, are designed to broadcast four separate audio connections: an integrated vxf-frame (i *) tayatacL It is not a part of the ystem). Broadcast systems that allow transmission and reception of human power (channels) from a single frequency modulation station (in four separate stereophonic sounds) (if it is possible to provide out-of-band emissions that may interfere with other stations, of course) It is necessary. This is one frequency modulation broadcast 関: TT current standard method! Substantial division: Whenever it passes, without recognizing a broadcast signal containing its harmonics, four stereophonic sound inputs can be achieved by a single main carrier i: multiplexed 1 L, etc. It is important to provide a system in which the number of transmissions is the minimum bandwidth inclusion. The receiver design is an essential compromise between adjacent channel selectivity and receiver channel bandwidth, since the present invention includes audio frequency inputs in four separate stereophonic relationships. It comprises both an apparatus and a method for transmitting and receiving a frequency-modulated main carrier. The device comprises a transmitter and one or more receivers), the transmitter is responsive to four separate inputs for producing four matrixes, each of the matrix means being at least one function Means for generating the main carrier and means Y for frequency modulating the main carrier with the 17th output of the main carrier ◎ it means for generating on the second carrier, 111th carrier H, 1 the first subcarrier Means for amplitude modulating at the second matrix output, at the same frequency as the first subcarrier. And means for generating a second subcarrier wave in an orthogonal phase relationship with the first subcarrier, means for amplitude modulating the second subcarrier with the sixth matrix output, and suppressing the first and second subcarriers. Means, and means for frequency modulating the primary carrier with the modulated sidebands of the first and second subcarriers. The frequencies of the first and second subcarriers are such that an air gap exists between the lower sidebands of them and the frequency band of the first matrix output. C: inside the air gap C: means for generating a pilot signal of falling frequency is given, O: means for frequency modulating the main carrier with the 09-05-2019 3 pilot signal is further given: more than the frequency of the first and second subcarriers Frequency C: A means for generating a third subcarrier% Amplitude modulation means for a third subcarrier according to the output of the $ 4 matrix, A means for modulating the third subcarrier by other methods最大 Filter means including the means of maximum maximum (two limit T) below. Remove all T except for a relatively small portion of the sideband above the sixth subcarrier and attenuate the top portion of the sideband below the sixth subcarrier (塾 pp # rrsoztp trunk ti □) In order to equalize the transit times of the signals of different frequencies passing through the zero equalizer means, the two transmitters are further modulated by the main carrier INt. Means for changing the frequency of the remaining part of the gAfIt band of the sub-carriers, the frequency of the third sub-carrier is between the lower sideband and the upper sideband of $ 1 and the second sub-carrier ≦≦ : A gap is present. The receiver of this system, 1st. 2nd and 6th sub-carrier 1I1V playback, pilot signal for reinsertion EndPage: No. 3; means for responding, means for detecting 4 matrix outputs, 4 matrices for reproducing 4 separate audio frequencies human power Output 0 (a preferred implementation of the above-described system comprising two responding de-fist matrix means (da-mtr *: tma3 #); Four separate audio frequencies human power is the symbol Ll. Assuming that LIRF and R, denote l, s but O], the four matrix outputs represent functions of their inputs as follows: 0 $ 1 matrix output: L, + L The second matrix output represents (L, + Lx) (RJlRJl), the 0th limiting means, the 4th matrix, the output of the 11th matrix, and the other possible highest levels. 6090-the maximum price certificate is limited. The maximum value of 60% is the many purpose book; optimal. Means for generating a control signal indicating the presence of the audio frequency input in four separate stereophonic tones! In the receiving 1ai 2, there will be a switching means that is responsive to the presence of the control signal, in order to partially disconnect the receiver when the control signal is not present. This switching means is also. The display signal is arranged to give an indication indicating the presence of an audio frequency input. The display signal preferably has the same frequency as the first subcarrier. This method consists of a method of transmitting and receiving frequency-modulated main carrier # LY with a stereophonic input. The method consists of generating four matrix inputs, each of which is a function of at least four separate audio frequency inputs, generating the main carrier Y and modulating the main carrier with the W & 1 matrix output. Further, generating the first iI 1 wt transmission #L, amplitude modulating the first subcarrier with the second matrix output, having the same frequency as the first subcarrier-), and quadrature phase relationship with the first subcarrier i It consists of generating two gJ & 2 subcarriers, modulating the second subcarrier with the sixth matrix output, and weakening or suppressing the first and second subcarriers. The main carrier, then modulated $ 1. The frequency is modulated in the sideband of the second subcarrier. The frequencies of the first and second carrier waves are such that there is an air gap 1) between the lower sidebands of the first and second subcarriers and the frequency band of the (17th) link output. In addition, the method comprises: generating a pilot signal at a falling frequency; generating a pilot signal at a falling frequency; modulating with a primary carrier pilot 09-05-2019 4 signal; Frequency of 1 subcarrier or more of frequency of 2 subcarriers or more 3rd subcarrier generation, amplitude modulation with the 3rd subcarrier fM ヲ 4th matrix output, weakening the 6th subcarrier (dmygzz *%! I) that the third sub-carrier is limited to substantially the maximum value below the other highest possible level of my, etc., removing a relatively small portion of the sideband above the fifth subcarrier, 51i It consists of attenuating the highest part (wpparntajtportion) f of the lower sideband of the carrier, and equalizing the travel time of the different 6th sub-carrier sideband part with different frequency. Furthermore, how is that? The frequency of the 0 @ 6 subcarrier comprising modulation of the main carrier with the remaining part of the modulated '@ 3 subcarrier sideband is% first and $ 2iIl! There is a gap between the lower wa [band of the transmission and the upper sideband]. The frequency-modulated n primary carrier is first transmitted by the antenna, and is transmitted. The method is further: ≦≦ 2, multiplying the pilot signal frequency 1: Comprising: regenerating, reinserting and regenerating '$ 2 and' j $ 5 subcarriers, detecting four matrix outputs, and regenerating four separate audio frequency signals V from four matrix outputs . The invention will be more fully understood by reference to the detailed description given in the following 5 and the accompanying drawings, rt, as well as 04 separate stereophonic sounding C 2 audio frequency inputs! A broadcasting system capable of transmitting and receiving the frequency-modulated main carrier including the transmission includes EndPage: 4 units 20 and a receiver 22 &, as shown in FIG. The four audio inputs are provided by four microphones 24 which pick up the sound from the four area portions where music or other broadcast programs are provided. Of course, one person, the force can be generated by any of a number of well known playback devices suitable for reproducing the four pre-recorded inputs. The audio input from one side of the area where they are generated is left front (LmμFrtnbt) left back (Laft Rear) for L, and the other two inputs are designated right front. It is designated as R and R for right back. Thus, the two left, two left and right signals are the left input 1 of a common two-channel stereo system; n considered corresponding, and the two right inputs are R, R1 and so on. The right input of the 2 channel stereo system &: considered to correspond. The main carrier is frequency-modulated TL in the transmitter 20, and the transmitting antenna 26 (two, therefore, n is 0) This broadcast signal is received [122 (:, between two parts of the receiving antenna 28 connected. The potential 発 生 1 generated 0 to 4 separate inputs are reproduced from the broadcast signal from the receiver 22 & 2 and make a broadcast program for the listener 32 located at the center, again TJ, 、, similar to the microphone 24 Four loudspeakers 6o arranged in the manner of (:: n applied 4 four separate audio frequency input information necessary information to reproduce the frequency of the main carrier is modulated) It is included in the broadcast signal in such a way as to fall within the frequency band of minimum width, ie to minimize the out-of-band radiation (mt-of-bandradiatm). FIG. 1 schematically illustrates the baseband utilization of a composite signal in which the 09-05-2019 5 primary carrier is modulated by a signal line. Sense of main carrier, behind the frequency modulation; It is considered to be divided into four separate channels. Each of them includes one of the transmitters 20t; one of the matrix outputs generated. The 1181 matrix outputs 1.50 Hz Hz F) 15 s 00 cyz C bits, 4 audio inputs, fall into the frequency band 66 representing the sum of L, E, and R1. C: away from this first matrix output frequency band 66: there is another frequency band 68, where C2 contains two channels 即 ち, ie one of them (L, +1. )−(Jj。 + R,) y Table 2 conveys the second matrix output, the other includes (L, -L,) (R, -R,), and includes the sixth matrix output. The third matrix output The part of the frequency band 68 occupied by. Steric ≦; indicated by region 40 The frequency band 38.40 extends to 2'5 J x z l 55 KH2. It is the sideband of the first subcarrier at 5 'IJ Iz and the same frequency and 1 $ 2 subcarrier in quadrature with the first [includes Y 他 の other frequency band 42 is the side of 61 H 2 It includes the wave band. This fourth channel. (LF-Lm) + (Rp-Rm) l: indication "f547) including a 9-track X output ◇ the combined signal further includes a 19 KHz pilot signal where 8 to 10% of the total modulation of the main carrier is desired The pilot signal is received by the receiver 22 at the first 22 second and third subcarriers t! Ilt '1 = used n to play. At least a 2 channel gives an indication that T is present ◎ The 76 Kc sixth subcarrier is suppressed, which means that about 5 parts of the total modulation of the subcarrier is included in the main carrier It is considered weak, to the extent that it is considered. This weakened third subcarrier & / or receiver 22 is detected by the receiver 22 and used as a control signal to indicate the presence of the fourth channel. If the I86 subcarrier is completely suppressed. The degree of modulation of the primary carrier in each of the frequency bands 56, 58-40 and 42 is equal to ninety of the largest possible modulation. The scheme for matrix output display (firmulag) is arranged so that the sum of the six modulations of 7′L, etc. does not exceed 90% of the maximum possible modulation, and the 511th carrier wave Is completely (not suppressed (F approximately 1 6ttb, x lower), but instead, simple: degree C considered as 5-of maximum possible modulation of main carrier C; suppressed If Each of the frequency bands 56.68-40 and 42 would be filled with 854 of the maximum possible degree of modulation. Another advantage of the above-mentioned Marx Liks arrangement is that it is fully C compatible with the currently used monophonic and two channel stereo systems; EndPage: 5 The first matrix output frequency band 36 is. An end-to-end, modified, ordinary monophonic receiver 1: The signal portion detected by 二 2 not 0 and that n includes the sum of 94 audio inputs giving a complete monophonic signal. Do. Young. C: made so that L, + L, correspond to the left channel. Also, if RF′′R1 is designed to correspond to the right channel C in a two channel configuration, then the second channel 38 is a common two disclosed in US Pat. No. 5,122.610 (inventor's patent). The second channel of the channel system (bidirectional O, ie, the first 2 channels) gives the sum value of the 2 normal stereo channels and de matrix (tLamlrix) in the usual way . The 19 KHz pilot signal is adopted as an international standard for the transmission of two-channel stereo sound signals, so this state of the 0 invention according to the invention arrangement is compatible with the two-channel system of 7 js-n currently used. O 8 09-05-2019 6 Here, the bandwidth utilization advantage 8 of the broadcast system disclosed is broadcast by SCA (5sbtid * aryComtmie atimaut ^ orimt * on) transmission 67 KH 2 but 95 KHz, which is the fifth harmonic of the 19 KHz pilot 46 Such as relatively low frequency 5: if it is allowed to broadcast as an additional 4th channel stereo broadcast 0 if 1 if plus or minus 5 KHz frequency deviation is used , S4 matrix output and 95 KHz; suitable part between frequency bands 42 carrying certain SCA information There should be separation. Of course, the system of the present invention is capable of producing and utilizing the combined signal shown in transmitter 20 and the first garden! The signal generating part of the transmitter 20 requires a receiver 22 ′ ′ 4 of FIG. 6 α, $ 6 b, 4 a, 4 h, 5 α and $ 545 Ai ̶schematic C: shown ◎ audio frequency inputs in four separate stereophonic relationships from the microphone 24 are supplied with a plurality of input terminals 45, 46, 48 and 50 (T shown in FIG. 6a) Is applied to the terminal 45, and its strong intubmty) is adjusted by six variable resistors 52 ≦ arranged in the form of @T ′ ′ between the terminal 45 and the conducting wire 54 grounded. O This is referred to as signal strength adjustment circuit 56-O input L is more than 1st order, more than 15 fMz audio frequency range! Normal low-pass filters 58 & 2 are provided to remove noise and information. Input, then, the ordinary 75 microphones 廿 second pre-emphasis circuit 60C two primary primary transformers 62 &; o and transformers 62 are given TL4: 1-so that the pre-emphasis times wr 60 Easton Bridge 644 is a combined two. Each of the other inputs R, L, and Rj is input, adjusted in a similar manner n, filtered, and Brien Encased, respectively, coupled transformers 66, 68 and 70 C; The input R, from the zero coupling transformer 66 is fed to the Wheaton bridge 64 where it is input. And OL, which is combined with this, are added on one side of the double bridge 64 which appears on the line 72, + L, Y <outline>. Then, as the line 74 on the sixty-four, as it produces, the other pole of the bridge 64 subtracts 0 powers Rj and R, which are from the transformers 68 and 7 o Bridge 76 ≦ 2 supplies, it is arranged in a manner similar to (bridge 76), bridge 64 sale, line 78 on 1: R, -R, line 80 on 1: R, tens B. Create Line 74 is connected to an amplifier 81 (shown in FIG. 6b g = shown) including three transistors 82, 84 and 86w o A line 72 includes five amplifiers nos. Similarly, the line 78 includes six transistors 94. 96 and 98 '& the amplifier 961 connected; the line 80 includes six transistors 100. 102 and 104 "Ik-including the amplifier 99 &; These amplifiers 81.87.93 and 99 are connected together to give four matrix outputs. Thus, the main carrier is to be modulated. Thus, the $ 1 matrix output, + L j l + R, + R, is fed by line 106 L = by amplifier 108 c, W! I2 matrix output (L, + La)-(R, Rs), line 110c, c "C amplifier 112 is supplied, sixth matrix, C out (L, = L,)-(RF-R1) Are supplied by the amplifier 114 ≦ line 114, and the I 84 matrix output (Lp−Rx) + (′ / − RJ) EndPage: 6 is supplied by the line 118 to the amplifier 120 gm. The Easton Bridge 64, 76 amps 2 amplifiers 81.87.93 and 99's plus provide matrix means 122, which provide 4 audio files, 4 audio outputs, 4 audio outputs, L ,. ! , And F, i, in response, each of which is at least one, in this preferred embodiment four input functions O FIGS. 4a and 4h (as indicated by the letters A-, G) In order to generate a control signal T that is combined with the subcarrier, the pilot signal and the outputs of the amplifiers 108, 112, 116, 09-05-2019 7 120), the TV indication TO 152, 000 nlz crystal oscillator 122 A temperature stable heater (heater) & 60 Hg, power supplied from a 117 V voltage source; The output of the oscillator 122 is two motorollers MC 791 PD # / 4 J-K 79 rough 17 o rough 124.126 t = n 1 nd order (:, it is continuous L: frequency division n, phase shift n, Four motroller MCI 709 C operational amplifier integrated circuit components are commercially available 5: used. Therefore, we will not describe the internal operation of 7n et al. The outputs of flip props 124 and 126 are: 152KHz (1) about 76KHz which will be mentioned later. 5f 3 K 11 z and 19 KHz in phase relationship 6; some square waves. Operational amplifier 128.130, 1! 12 and 164. Acts as an integrator that converts a square wave into a sawtooth shape a (two-way conversion. The output of each operational amplifier is shaped into a sine wave by one C2 of the plurality of field effect transistors 146, 148, 150 and 152. The outputs of these field effect transistors are respectively it 76 KHz, 58 KHz and 19 KHz. I The 5f3 KHz output of field effect transistor 150 is 90 degrees slower than the 5f3 KHz output of field effect transistor 148. The output of the transistor 14B and the output of the transistor 146 are both one-half of the 152 kHz oscillator frequency 6 times 1/2 19 kHz, which is the output of the transistor 152-its harmonics The base currents of the first transistor stages of .156 and 158 are each individually adjusted by one of a plurality of variable capacitors 162. 164 and 166 to provide phase matching with the input to amplifier 160 Be done. Amplifier 16 CH: Relatedly, it is not necessary to provide a variable capacitance. What n is, because it is a reference point (reference point) to which the other branch is adjusted. The outputs of the circuits shown in FIGS. 3h and 4h. Figures 5g and 54C: Input terminal 6 of the circuit shown; the 19 KHz output of the supplied 0 amplifier 160 is supplied by a pilot amplifier 184C for providing a pilot signal by the input terminal 168 o Level of this pilot signal And the phase is adjusted by II adjustable resistors 185 and 186, respectively, equal to 10% of the maximum degree of modulation of the main carrier. The output of pilot amplifier 184 is the first matrix from amplifier 108 at node 187c. Output 5; added. A "triple amplifier 188" (supplied-rL, including transistor 189 and impedance matching resistor 190). The combined pilot and pre-amplifier 188 matrix output, the output of the multistage low pass filter and delay means 191 is supplied as the first power source transistor 192g: 6 by transistor 192 and the other two transistors 196.198. The 3811z output of amplifier 156 is supplied to input terminal 172, and the $ 2 matrix output from amplifier 112 is supplied to input terminal 174. These terminals are zero. Mo) 0-la MC 1596 GBalanced Mmtdator Dmwc Lulatey 200 (: give insert. A similar balanced modulator 202 is The 68 KHz output of amplifier 158 and the sixth matrix output from amplifier 116 are provided through input terminals 176 and 178Y. Each of balanced modulators 200 and 202 provides two outputs, which are respectively converted into a single output by summers 204, 2061; The outputs of the adders 204 and 206 are supplied to the other adder 208t: supplied 〇 amplifier 156 and 158 158) out cover, 58ffj! C. The means for generating these subcarriers which provide subcarriers which are in a first and second 09-05-2019 8 quadrature phase relationship with the C * signal is a quartz oscillator 122. Flip flop divider drain (EndPage: 7diwidgrcLraix) 124, 126-operational amplifier 160 and 162. Field effect transistors 148 and 150. And amplifier 156.158. Balanced modulators 200, 202 are coupled to the first two of amplifiers 112, 116. Each of the 3 rd matrix outputs co-respectively: these 1 s. Form means for modulating the second subcarrier. The first subcarrier taken out of the amplifier 158 and fed to the input terminal 172 is advanced by 90 degrees from the f′L taken out of the amplifier 156 and the terminal 176g = the second subcarrier fed. Balanced modulators 200, 202 are also each one of the first. A means for suppressing $ 2 sub-carrier W is configured. The output of summer 208 is the sidebands of the modulated n first and second subcarriers. Et al are supplied to the 26-53 KHz band pass filter 210 and to the delay means 212. The 76 KHz output of the amplifier 154 constituting the sixth IiIl carrier is supplied to the input terminal 180i, the fourth matrix output of the amplifier 120 is supplied to the input terminal 182, and the other is supplied to the 0 terminal. Controller 214c is connected. It is similar to the balanced modulator 200. 202 described above. The two outputs n of the balanced modulator 214 are coupled to differential amplifiers. The differential amplifier then forms, together with the transistor 222, limiting means 224 for limiting the degree of modulation of the sixth subcarrier by the fourth matrix output to a maximum value C2 below the other highest possible level. The function of this limiting means 224 is to determine the amplitude of the maximum output of the transistors 218, 220 according to the bias level established by the variable resistor 225, the 76 KHz 3 out of band modulation to prevent the out-of-band radiation is an undesirable high level C 2 か C C 二 制 限 制 限 制 限 制 限 制 限 制 限 制 限 制 限 制 限 制 限 制 限 制 限 制 限 制 限 制 限 制 限 Although the limiting means will be a compressor I will. Most Effective &: To achieve this purpose the maximum degree of modulation should be limited to the highest level of 60-90 qb available elsewhere. It has been found that limiting approximately to a maximum value of 60 近似 results in many objectives ≦; optimum C 2. Of course, there are many circuit arrangements that can be used to limit the degree of modulation of the sixth subcarrier 0, eg, limiting the fourth matrix output before it is applied to the balanced modulator 214. It would be possible to limit the sixth subcarrier to 1 as important (5iPifieant) as K, not effective on the sound quality produced by V stem C 2 if 0 n otherwise, definition of matrix output C: The degree of modulation according to the fourth matrix output often exceeds the maximum value which is limited, and it is generally a short time when a limitation occurs. The output of limiter 224 is applied to a 46 fez-76 KHz filter 228 which is suppressed, ..., a relatively small portion of the sideband above the third subcarrier being suppressed. Remove all but the top part of the lower sidebands. In order to create an energy distribution, shown schematically as frequency band 42 in FIG. 1C, filter 228 has a low 4 (5 KHz ji @ number of passes but lower a-wave bands. It should be noted that the single t = 611 Jzt = extending is not exactly ◎ The transmitter 20 has one synthetic signal divided into two separate stereophonic audio frequencies input according to the invention of the present invention Means 268 for generating a 76 KII z control signal indicating. This control signal generating means 238 09-05-2019 9 is similar to the pilot amplifier 184 and receives 76 KHz input from the connected Am line 240 through the line 242 k from the switch 248 gm. And the line 242 is connected to the input terminal 180 ヲ balanced modulator 214C sequentially. The output of the control signal generating means 268 is supplied by the line 244 & the output of the additional delaying means 262 (at: node 2464). The switch 248 is ≦ 2 to disconnect the control signal generating means 268. The four matrix outputs, the 19 ffz pilot signal and the control signal are in one sense added to the broadcast signal, so their phase relationship is critical to one another. If the proper phase relationship can not be maintained, crosstalk between channels will occur. The second and sixth matrix output signal generators increase the transit time to be equal to that of the $ 4 matrix output 0, since a complex path through them has been added 1; Has the longest running time. EndPage: It is desirable to have 8 time 1-time equalization means 260, which receives the output of the filter 228-the function of 0 1-time equalization means 260 is an all-pass filter, Filter means 2281 Equalization means 260v Equalize transit time signals of different frequencies to pass through 0 Zero-intelligent time delay means 262 sympathize with the output of one equalization means 260 Given to provide fine adjustment of time. The output of the additional time delay means 232 is fed to an adder 194, whose function is to combine the four matrix outputs and the output of the zero adder 194. Amplified by the transistor 250-two ordinary exciter 1: The source, where it is frequencymodulated by the transmitter 20, which modulates the frequency-modulated transmitter output in a known manner Receiver 22 which has been designed to use the primary carrier C: No. 6. Seventh. 8 and 9 straight; illustrative ≦; shown n こ の This receiver 22 is a common antenna 28 ° high frequency amplifier 292. Mixer 294. The intermediate frequency amplifier 296, and this circuit 1C, as described in detail, the 1M detector 298 has to be equipped with a speaker 60 In order to reproduce four separate audio frequency inputs supplied by two sources, Regenerate the second and third subcarriers and detect the four matrix outputs. Four matrixes, speech matrix (dε- 屏 atriac) 1. なければならない。 Although the receiver 22 described here performs the functions of these: L is well suited, but as with the transmitter 20, the receiver 22 has many within the scope of the inventive concept. Change the page in a way. These functions may be appropriately ≦: 0. However, the receiver 22 is a part of a broadcasting system, and is specially designed to utilize a composite signal generated by the cooperative transmitter 20; It must be done. Sixth. Seventh. 8 and 9; a portion of the preferred receiver 22 shown is part of an integrated circuit design and detects four matrix outputs by time division of the composite signal. These features of the receiver 22 are not absolutely essential, and the four matrix outputs can be detected by more conventional tuning circuits. However, such an arrangement does not provide many of the advantages of inductorless integrated circuits useful for time division techniques. The signal from 1M detector 298 is applied to input terminal 300 and passes through an amplifier (shown in FIG. 6: shown) 09-05-2019 10 containing transistors 302, 304, 308 and 308 to develop two separate signal channels. . This configuration provides a signal to the integrated circuit for immediate use. A DC output is taken from the transistor 306 by the line 310, and an AC out DC power is taken from the transistor 30g by the line 3 ''. Unwanted alternating current components are removed from the signal by capacitor 314 before reaching the pace of transistor 306. The bias voltages generated in section 320 (shown in FIG. 6), which is a common arrangement, are utilized to provide the necessary voltage levels to the various parts of the integrated path described below. Lines 310, 312 are signals to the quadrature detector (q 塾 adrat word dmtmetsr) 326 (shown in FIG. 7) where the signal is applied to the pace of the two transistors 328, 330 forming a differential amplifier. give. This amplifier is connected to and driven by two pairs of transistors 332 and δ 334, 336 and 1338 which form a two pole, double throw switch. The state of this switch is determined by the divider (fraqse * cydivider) i; Detector 326. Current control oscillator 348. The DC amplifier 35G and the frequency divider 346 form a phase lock loop (phaselockad1 eap). The output of detector 326 is applied to the bases of transistors 352 and 354 which form a DC differential amplifier 350. The output of this amplifier 350 is thus converted from a voltage signal to a current signal by the transistors 360, 362 'and then applied at the emitter of the transistor 363 to the EndPage: 9 current control oscillator 348. Oscillator 348 is a modified emitter-coupled monostable multivibrator such that the charging current is a function of the signal current applied through transistor 363 through capacitor 364 outside the integrated circuit. This current flows through diode 368 and parallel load resistor 376, transistor 378, capacitor 364 and transistor 372. This (a current of two forks is a diode 374 and a parallel load resistor 37G). It flows through capacitor 364 and transistor 380. Transistors 372 and 380 form a differential current switch that is responsive to the differential voltage across transistors 371 and 378. Transistors 371 and 378 have cross-coupled collectors and bases to provide the necessary feedback for monostable operation. The transistor voltage bias of current controlled oscillator 348 is provided by line 386 from bias voltage generation portion 320. Free running frequency of oscillator 348 (/ rag? %% 11 & jfrmq% g% el) (approximate (= 16 KHz) is determined by the current. The output of the voltage controlled oscillator 348 taken from the bases of the transistors 372 and 38G is a 75 KHz square wave applied to a pair of terminals 387 and 388. This is an input to the 1 divider 346. The splitter 346 comprises two modified current mode logic, master slave flip flops (FF). A master-slave FF consisting of a pair of transistors 392 and 394 and a pair of transistors 408 and 410 is elacked with a 75 KHz oscillator 348 and 990 'to produce two phase 39f # z signals Thus, 's1. 1st. Create a carrier wave. 311138 KHz sub-carrier line outputs @ 44B. It is taken out from 450. The second subcarrier 38 KHz, which is behind the first by 90 degrees, is extracted from the pair of output lines 458.degree. The transistor pair 412, 414 constitutes a gate switch means for gating the master F 1392, 394, and the transistor pair 404, 406 constitutes a gate switch means for gating the slave cages 408, 410. The output from the master FF is shifted to a DC level by transistor resistor networks 396, 398, 400 and 397, 399, 401 driving output lines 458, 456. 09-05-2019 11 The DC level of the slave FF's output is left by the transistor network 407 ° 411, 409 and 412, 413, 415 which drives the output lines 448, 450. The transistor pair 389, 390 constitutes clock switch means for driving the master slave IF from the oscillator 348. The second master slave jFF is clocked from the 23174 KHz signal from the first master slave FF to produce two H) fJfz signals in quadrature. The 119f # z signal is extracted from the pair of output lines 438 and 440. The 's219f # z signal, which leads J1 by 90 degrees, is taken from a pair of output lines 434, 436. The operation of the second master slave FF including the gate switch means, the clock switch means and the DC level shift means is identical to the first master slave FF. The 19 KHz output is provided by output lines 434 and 436 (: by: transistors 334 and 332, respectively, of detector 326 to complete the phase lock loop. One pair of output lines 438 and 440 supplies the outputs of the FFs 430 and 432 to the bases of the transistors 542 and 544, 540 and 546 of the 19f # z / (slot detector 528 in FIG. FIG. 8 also shows means 442 for detecting the four matrix outputs. The oscillator 348 (1) 75 KHz output is taken out from the output terminals 387 and 388 and supplied to a pair of input terminals 444 and 446 in the matrix output detection means 442. The 39 KHz first subcarrier generated by the FFs 408 and 410 is taken from the pair of output terminals 448 and 450 of the splitter 346 and applied to the pair of input terminals 452 and 454 in the matrix output detector 442 (Reinserted). Similarly, the 39 KHz% 2 subcarrier generated by J '7392, 394 delayed by 90 degrees from the output of FF 408, 410 is taken from the pair of EndPage: 10 output terminals 456, 458 of the splitter 346, A pair of input terminals 460 ° 462 (two applied (reinserted) in the matrix output detection means 442). Thus, the current control oscillator 348 forms a means for regenerating and reinserting the third subcarrier which is 16 KHzH :. Minuteers 346 (DIFs 392, 394 and 408, 410) *, 1st in the 3 gffz. A means is provided to regenerate and reinsert the second subcarrier. Input terminals 452 and 454 g) A 36 KHz signal is applied to the gate consisting of transistors 464 and 466, and a 4-pole, double throw, double throw switch 468 is used to control time division sampling of the composite signal. Operate. The combined signal is taken from the lines 322, 324 and applied to the pace of the two transistors 470, 472 by the two lines 469, 4701 =, thereby forming a differential amplifier. In a similar manner, the late 3 ff-Hz signals from input terminals 460 and 462 are applied to gate 474 which operates a two pole, double throw switch 476 to control the sampling of the signal applied to differential amplifier 478. . Gate 480 operates a two pole, double throw switch 482 which controls sampling from terminals 444, 446. In this way, the signal is sampled for an appropriate time (::, given four matrix outputs as the outputs of the swings 468, 476 and 482. The switch outputs include four transistors 488, which divide each output of switch 468 into two outputs, four transistors 490, which divide each of the two outputs of transistor 476 into two outputs, and a switch 482, respectively. A de-matrix means 486 consisting of four transistors 492 is applied which divides the output into two outputs. The outputs of the transistors 488, 490 and 492 have four output terminals 494 and 09-05-2019 12 496. At 498 and 500, the matrix outputs giving the original four audio frequencies human power Ly, Lm, Ry, Rx are connected together to add and subtract. Reception @ 22 further comprises means 528 (FIG. 8 (shown)) for detecting the presence of the 19 KHz pilot signal 43, which is applied to the differential amplifiers 548, 550 (': thus: Four transistors 540, 542 arranged to form a two pole, double throw switch to sample the signal. 544 and 546 are included. The switch is operated at 19 KHz (9 ratio) by the 19 ffz signal from the splitter 346 so that the 19 KHz pilot signal in the composite signal is detected and the DC voltage proportional to the amplitude of the 19 f # z pilot is two resistors 552 , 554 and the variable resistor 556. Capacitor 558 filters the AC signal between these resistors. The resistors 552, 554 and 556, of course, are external components with respect to the integrated circuit of the receiver ai 122. The voltage drop across the arrangement of resistors 552, 564, 556 and capacitor 558 is proportional to the amplitude of the 19 KHz pilot signal 43. This voltage drop is applied to differential DC amplifier 562 and to differential amplifier 564 which includes one pair of transistors 566 and 568. The transistor 568 has a fixed voltage level that is applied to a resistive voltage divider (γazsziar-diwid * r) 570e572 <: Jo's "C" 17). Thus, if amplified by detector 528 and DC amplifier 562 E, if the level of pilot 43 in the combined signal is higher than the dark value determined by resistive divider 570, 572, then transistor 568 through resistor 561. The transistor 566 is tuned and the transistor 568 is detuned by the regeneration action of the transistor 564 connected to the pace of the transistor 566 of the When transistor 568 is detuned, the voltage level at its collector rises, increasing the voltage level applied as feedback to the pace of transistor 566 kept in tune. Conduction of the transistor 566 causes current to flow to the transistor 576, increasing the voltage between the resistor 578 and forward biasing the transistor 580 and the other transistor 582. Transistor j 582 operates a ramp 584 giving an indication, 15 "indicating that the Igffz pilot is being received," indicating that it is strong enough to reproduce two stereo channels. EndPage: The current that forward biases the 11 transistor 576 also forward biases the transistor 586. The collector current from this transistor is then fed to the transistor 388, which will turn off if the pilot signal level is not high enough for 2f Yannel reception, so that the appropriate part of the receiver @ 22 (FF 464, 466) )). The receiver 22 optionally includes switching means 6 o O (丞 y in FIG. 9), which is responsive to the presence of the control signal 44 at 76 KHz in the composite signal. The function of the switching means 60G is to provide an indication by means of a funpro 02 indicating the presence of four audio frequency inputs. The switching means 600 is also arranged to disconnect part of the receiver 22 at the matrix output detector 442 when the display signal 44 is not present. This part of the receiver 22 is a gate 48G (Knee controlled amplifier 484) which detects an amplifier 478 controlled by a gate 474 which detects the 's4 matrix output and the s3 matrix. A gate 48 is provided by a terminated line 604 connected to the rectifier. Switching means 600 is similar to 19r # z pilot detector 52g (shown in FIG. 88), and transistor 606 and lamp 602 are 09-05-2019 13 operated in the same manner as transistor 586 and lamp 584. The 76 KHX control signal indicates that four audio inputs can be extracted from the combined signal, so the lamp 602 is fired and the transistor 606 is tuned only if it has sufficient amplitude. A switch 636 is provided to connect the line 604 to ground so that the amplifiers 478, 484 can be manually disconnected. Of course, the switching means 6oo is useful only if the weakened 79 KHz third subcarrier is not suppressed but is only weak and transmitted to provide a control signal. The broadcast V-stem described above provides transmission of a broadcast signal that includes audio frequency inputs in four separate stereophonic relationships. This signal conforms to the standard (= standard established method for 2-channel stereo FM broadcasting) and is completely compatible with the existing monophonic and 2-channel stereo equipment. Although modulation at the transmitter has been described in terms of suppressed carrier amplitude modulation, the generated signal is essentially similar to the signal generated by AC channel time sampling considered equivalent technology It is well known. Similarly ::, the two methods are internally modifiable at the receiver. The embodiments are as follows. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 schematically shows the base band of the synthesized signal used to modulate the main carrier transmitted and received according to the present invention, and FIG. 2 shows the present invention according to the present invention. Fig. 6 is a pictorial representation of the broadcast system configured. Figures 3 @, 3h, 4 @, 44, 5a and tF5bWJ # t, diagrammatically showing part of the transmitter which is part of the system of FIG. 2, 3m 6, 7 8 and 9 FIG. 112 schematically illustrates a portion of a receiver that is part of the system of FIG. Patent applicant General Elektrak Company Agent Patent Attorney Tamaku Five Section EndPage: 134 List of attached documents; (I) 9I-no,-I amended procedure (spontaneous)-October 1 '1 1 1 E1, title of the invention-title of the invention-channel 4-channel stereo sound system Person address □ United States of America New York State 12305 Revere 6-No. 1 Name General Electric Company Representative Andon ・ Jie ・ Will Basic Etc. F / To, Fig, 3 σ End Page: 19 Warning: Page 09-05-2019 14
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