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1. 发明申请

WO1997047102A1 BTSC ENCODER 审中-公开
标题翻译： BTSC编码器
公开(公告)号：WO1997047102A1
公开(公告)日：1997-12-11
申请号：PCT/US1997009493
申请日：1997-06-02
申请人： THAT CORPORATION
发明人： THAT CORPORATION , HANNA, Christopher, M.
IPC分类号： H04H05/00
CPC分类号： H04H20/88 , G10L19/008 , H04N5/602 , H04N7/06 , H04R5/04 , H04S5/02
摘要： A BTSC encoder (200) includes a left digital high pass filter (212) for receiving a digital left channel audio signal (L) and generating a digital left filtered signal; a right digital high pass filter (214) for receiving a digital right channel audio signal (R) and generating a digital right filtered signal; a matrix includes an adder (216) for summing the digital left and right filtered signals and generating a digital sum signal (L+R), and including a subtractor (218) for subtracting one of the digital left and right filtered signals from the other of the digital left and right filtered signals and generating a digital difference signal (L-R); a difference channel processor (230) for digitally processing the digital difference signal (L-R); and a sum channel processor (220) for digitally processing the digital sum signal (L+R).
摘要翻译： BTSC编码器（200）包括用于接收数字左声道音频信号（L）并产生数字左滤波信号的左数字高通滤波器（212）用于接收数字右声道音频信号（R）并产生数字右滤波信号的右数字高通滤波器（214）矩阵包括用于对数字左和右滤波信号求和并产生数字和信号（L + R）的加法器（216），并且包括用于从另一个中减去数字左和右滤波信号之一的减法器（218）数字左和右滤波信号并产生数字差分信号（LR）; 用于对数字差分信号（L-R）进行数字处理的差分信道处理器（230）; 以及用于数字处理数字和信号（L + R）的和信道处理器（220）。

2. 发明申请

WO1992014311A1 AM-FM COMBINED STEREO RECEIVER 审中-公开
标题翻译： AM-FM组合立体声接收器
公开(公告)号：WO1992014311A1
公开(公告)日：1992-08-20
申请号：PCT/US1992000885
申请日：1992-02-04
申请人： MOTOROLA, INC.
发明人： MOTOROLA, INC. , ECKLUND, Lawrence, M.
IPC分类号： H04H05/00
CPC分类号： H04H20/49 , H04B1/1646
摘要： An improved AM-FM combined stereo receiver (100) is provided having a single processor (155) for removing, in the FM mode, arc tangent distortion, and in the AM mode, to process the phase term from arc tangent {L - R / 1 + L + R} to determine {L - R / 1 + L + R}. Further, the radio includes a single discriminator circuit (161, 137, 139) wherein, in the FM mode, the discriminator tank circuit (137, 139) is used to convert frequency deviation to baseband audio and, in the AM mode, the discriminator tank circuit is used as the frequency-determining element for the voltage controlled oscillator (VCO) (161), the VCO being used to translate the intermediate frequency (IF) signal to baseband.
摘要翻译：合并的立体声接收机完善MA-MF具有单个处理器（155）以除去，在MF模式中，反正切失真和MA模式，从{L的反正切处理相位项（100） - R / 1 + L + R}来确定{L-R / 1 + L + R}。此外，该无线电设备包括一个单一的鉴别器电路（161，137，139），其中，在MF模式，鉴别器储能电路（137，139）被用于带材的低频频率偏差转换并且在MA模式中，鉴频器帽电路用作压控振荡器（VCO）频率确定元件（161），该VCO用于将中频（IF）信号转置到基带。

3. 发明申请

WO1988001814A1 BROADCAST SIGNAL DETECTED INDICATION SYSTEM 审中-公开
标题翻译：广播信号检测指示系统
公开(公告)号：WO1988001814A1
公开(公告)日：1988-03-10
申请号：PCT/US1987001705
申请日：1987-07-20
申请人： MOTOROLA, INC.
发明人： MOTOROLA, INC. , ECKLUND, Lawrence, M.
IPC分类号： H04H05/00
CPC分类号： H03J7/18
摘要： In a radio having an in phase multiplier (A) for providing an in phase detected signal, a detection unit for receiving this signal and for determining whether this signal includes any negative polarity components which would indicate that a viable broadcast signal does not exist on the incoming frequency of interest. This detection unit can include a comparator (11) for comparing the incoming signal against a selected reference value. The invention can also include a signal quality evaluation unit (58) for providing either a digital or analog quality signal that can also effect the output and be used by appropriate processing circuitry to further refine the channel selection process.

4. 发明申请

WO1982003304A1 PILOT TONE DETECTOR UTILIZING PHASE DEVIATION SIGNALS 审中-公开
标题翻译：使用相位偏差信号的引导音检测器
公开(公告)号：WO1982003304A1
公开(公告)日：1982-09-30
申请号：PCT/US1982000254
申请日：1982-03-01
申请人： MOTOROLA INC
发明人： MOTOROLA INC , ECKLUND LAWRENCE MARVIN , DRONG FRANK JR
IPC分类号： H04H05/00
CPC分类号： H04H20/49
摘要： Une tonalite pilote stereophonique a modulation d'amplitude est detectee en utilisant deux signaux derives d'un signal d'emission recu. Un signal est proportionnel a la deviation de phase et l'autre est un signal a deux niveaux qui est une fonction de la valeur de la deviation de phase. Le detecteur commande l'actionnement de l'indicateur visuel (38), le reglage en silencieux du canal stereo de commutation en mode mono/stereo avec une elimination presque complete des fausses detections pendant une emission monophonique ou en cas de mauvaise reception d'une emission stereo.

5. 发明申请

WO1984003807A1 FM STEREOPHONIC RADIO BROADCASTING SYSTEM HAVING S CHANNEL COMPANDING 审中-公开
标题翻译： FM STEREOPHONIC无线电广播系统具有S通道的选择
公开(公告)号：WO1984003807A1
公开(公告)日：1984-09-27
申请号：PCT/US1984000340
申请日：1984-03-05
申请人： TORICK, Emil, L. , KELLER, Thomas, B.
IPC分类号： H04H05/00
CPC分类号： H04H20/48 , H03G7/00 , H04B1/64
摘要： An FM stereophonic radio broadcasting system in which stereophonically related audio frequency source signals L and R are matrixed in a matrix network (10) to obtain stereophonic sum and difference signals M and S, respectively. At the transmitter, the difference signal, S, is compressed in a compressor (16), and the S and compressed-S signals modulate two quadrature-related sub-carriers of the same frequency in modulators (14, 18) to develop two double-sideband, suppressed-carrier signals, the frequency of the sub-carriers being sufficiently high to assure a frequency gap between the lower sidebands of the modulated sub-carrier signals and the sum signal M. The M signal, the aforementioned suppressed-carrier signals, and a pilot signal having a frequency which lies within the frequency gap, are combined in an adder (12) and frequency-modulated onto a high frequency carrier for the purpose of transmitting the same to one or more remote receivers (24). The receiver includes an expander (30) for expanding the received compressed signal S, and the expanded difference signal is combined with the received M signal to reproduce the audio frequency source signals L and R. The system increases the broadcast coverage area over that of current biphonic service yet is compatible with existing monophonic and biphonic receivers.
摘要翻译：立体声相关的音频源信号L和R被矩阵化的FM立体声无线电广播系统分别获得立体声和差分信号M和S。在发射机处，差分信号被压缩，并且传统的差分信号和压缩的差分信号调制相同频率的各个正交相关子载波以产生两个双边带，抑制载波信号，子频率载波足够高以确保调制的子载波信号的下边带与和信号M之间的频率间隙.M信号，上述抑制载波信号和具有位于该信号中的频率的导频信号频率间隙被组合和频率调制到高频载波上，以将其发送到一个或多个远程接收机。接收机包括用于互补地扩展接收的压缩差分信号的扩展器，并且扩展的降噪差信号与接收到的和信号相组合，以再现音频源信号L和R.系统增加广播覆盖区域超过目前的双声道服务与现有的单声道和双声道接收机兼容。

6. 发明申请

WO1983004459A1 SIGNAL INTERFERENCE PROTECTION CIRCUIT FOR AM STEREO RECEIVER 审中-公开
标题翻译：信号接收机的信号干扰保护电路
公开(公告)号：WO1983004459A1
公开(公告)日：1983-12-22
申请号：PCT/US1983000906
申请日：1983-06-07
申请人： MOTOROLA, INC.
发明人： MOTOROLA, INC. , ECKLUND, Lawrence
IPC分类号： H04H05/00
CPC分类号： H04H20/49
摘要： In the field of AM stereo detection, co-channel or adjacent channel interference may cause some distortion and side-to-side movement of a stereo signal source as well as false "stereo detect" signals in AM stereo receivers having phase locked loop (PLL) systems. The invention provides a filter (12) receiving the incoming signal and passing only the frequencies resulting from said interference; a sensor (16) measures the output of the filters and if this signal is above a given level, the monophonic mode is enabled, i.e., the pilot detector (44), the stereo presence indicator (46) and the stereo mode switch (42) are disenabled for a timed interval. A higher given level for stereo disenablement is required if stereo transmission with added pilot tone is being received.

7. 发明申请

WO1982001970A1 IN-BAND SIGNALING SYSTEM FOR FM TRANSMISSION SYSTEMS 审中-公开
标题翻译：用于FM发射系统的带内信号系统
公开(公告)号：WO1982001970A1
公开(公告)日：1982-06-10
申请号：PCT/US1981001567
申请日：1981-11-27
申请人： MAISEL DOUGLAS A
IPC分类号： H04H05/00
CPC分类号： H04H20/31 , H04B1/1646 , H04H20/48
摘要： Systeme de signalisation dans la bande permettant d'injecter au moins une tonalite sonore a basse frequence dans un signal sonore stereo, comprenant un circuit generateur de tonalite (30, 32) et un circuit de production d'un premier et d'un deuxieme signaux composants pour chaque tonalite (42, 50), chaque signal composant possedant une amplitude sensiblement egale a l'autre signal ainsi qu'une phase opposee par rapport a celui-ci, ce circuit generateur de tonalite (30, 32) commandant la production de la (ou des) tonalite(s), de maniere a fournir une indication de l'etat des circuits auxiliaires d'un systeme de transmission stereo a modulation de frequence. Un premier circuit additionneur (52) injecte le premier signal composant dans le canal gauche du signal stereo, tandis qu'un deuxieme circuit additionneur (54) injecte le signal composant en opposition de phase dans le canal droit du signal stereo, de maniere que lorsque les canaux stereo gauche et droit sont multiplexes par modulation de frequence d'une maniere conventionnelle (24), la (ou les) tonalite(s) apparait uniquement dans le canal differentiel du signal a modulation de frequence et non pas dans le canal d'addition. Un circuit de melange (60) elimine l'information de separation stereo entre les canaux stereo gauche et droit au-dessous d'une certaine frequence de coupure de maniere a ameliorer la detection des tonalites injectees possedant une frequence plus basse que la frequence de coupure.

8. 发明申请

WO1981002822A1 AM STEREOPHONIC DECODER 审中-公开
公开(公告)号：WO1981002822A1
公开(公告)日：1981-10-01
申请号：PCT/US1981000111
申请日：1981-01-21
申请人： MOTOROLA INC
发明人： MOTOROLA INC , HILBERT F
IPC分类号： H04H05/00
CPC分类号： H04H20/49 , H01L31/1123
摘要： A decoder for use with a compatible AM stereophonic signal of the form (1+L+R) cos (Wct + 0) utilizes an amplifier (26) and a feedback loop from the amplifier output to control the output of a multiplier circuit (28 or 36) which is one input to the amplifier. The amplifier output is thus forced to become the required correction factor used in deriving the stereo program signals from the AM stereophonic signal.

9. 发明申请

WO1981000497A1 TANGENT FUNCTION GENERATOR FOR AM STEREO 审中-公开
标题翻译：立方体的功能发生器
公开(公告)号：WO1981000497A1
公开(公告)日：1981-02-19
申请号：PCT/US1980001003
申请日：1980-07-18
申请人： MOTOROLA INC
发明人： MOTOROLA INC , MARIK C
IPC分类号： H04H05/00
CPC分类号： H04H20/49 , G06G7/22
摘要： A function generator as for use in a system of compatible quadrature AM stereo approximates the tangent function curve, allowing for the provision of essentially undistorted intelligence signals, A form of differential amplifier, including additional multiple threshold transistor circuits (Q2, Q2, Q3, Q4, Q5, Q6) with common collectors and common bases, has at its input terminals a signal related to an angle of modulation and provides an output signal approaching a signal related to the tangent of the angle of modulation, the accuracy of the approximation depending on the number of circuits included. The function generator has the capability of providing other similar functions and of use in other applications. As used for AM stereo decoding, a tangent function output is derived from the phase modulation components of the stereo derived from the phase modulation components of the stereo signal and, when multiplied by the amplitude modulated signal, the stereo difference signal can be derived.

10. 发明申请

WO1998057455A1 SYSTEM AND METHOD FOR TRANSMISSION OF AUDIO SIGNALS TO REMOTE LOCATIONS USING A POWER LINE CARRIER 审中-公开
标题翻译：使用电源线载波传输音频信号到远程位置的系统和方法
公开(公告)号：WO1998057455A1
公开(公告)日：1998-12-17
申请号：PCT/US1997023213
申请日：1997-12-11
申请人： PHONEX CORPORATION , BULLOCK, Scott, R. , SEELEY, Daniel
发明人： PHONEX CORPORATION
IPC分类号： H04H05/00
CPC分类号： H04H20/48 , H04B3/54 , H04B2203/545 , H04H20/84
摘要： A system and method for transmission of both stereophonic and monophonic audio signals using a power line are disclosed. The stereophonic system (102) and method include hardware and method steps that compress and modulate a 2-channel input (104a, 104b), filter the signal, and use a transmitter and line interface (116) to place the multiplexed FM signal (115) onto a power line carrier, and then decode and demultiplexed the signal and utilize an audio amplifier (129) to provide high quality audio output at a remote site without the use of dedicated wiring or airwave transmission. Similar steps and hardware are utilized by the monophonic version.
摘要翻译：公开了一种使用电力线传输立体声和单声道音频信号的系统和方法。立体声系统（102）和方法包括压缩和调制2声道输入（104a，104b）的硬件和方法步骤，对信号进行滤波，并使用发射机和线路接口（116）将多路复用的FM信号（115 ）到电力线载波上，然后对信号进行解码和解复用，并且利用音频放大器（129）在远程站点提供高质量的音频输出，而不使用专用布线或空气波传输。类似的步骤和硬件由单声道版本使用。

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