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1. 发明申请

WO1994017630A1 APPARATUS AND METHOD FOR SELECTIVELY DEMODULATING AND REMODULATING ALTERNATE CHANNELS OF A TELEVISION BROADCAST 审中-公开
标题翻译：用于电视广播的选择性解调和重构替代频道的装置和方法
公开(公告)号：WO1994017630A1
公开(公告)日：1994-08-04
申请号：PCT/US1994000593
申请日：1994-01-27
申请人： SCIENTIFIC-ATLANTA, INC.
发明人： SCIENTIFIC-ATLANTA, INC. , INGRAM, Eric, James , FARMER, James, O.
IPC分类号： H04N05/60
CPC分类号： H04N19/597 , H04N5/44 , H04N5/607 , H04N5/62 , H04N7/06 , H04N13/156 , H04N13/161 , H04N13/194
摘要： An apparatus and method for demodulating and remodulating a transmitted signal prior to presentation to a television receiver, the transmitted signal comprising a video signal, a first channel signal, and a second channel signal, wherein one of the two channel signals is selected, demodulated and remodulated with the video signal prior to presentation to the television receiver. The apparatus allows the viewer of a television receiver which accepts a single channel signal to select between one of two alternate channels signals associated with a video broadcast without the need to modify the television receiver. The apparatus is particularly well suited for television broadcasts using a dual carrier transmission format. A novel varactor diode tuning means is used in one embodiment for changing the center frequency of a frequency modulation demodulator. The disclosed apparatus also transparently allows stereo demodulation for television receivers which are capable of such stereo demodulation.
摘要翻译：一种用于在呈现给电视接收机之前对发射信号进行解调和再调制的装置和方法，所发送的信号包括视频信号，第一信道信号和第二信道信号，其中两个信道信号之一被选择，解调和在呈现给电视接收机之前用视频信号再调制。该装置允许接收单个信道信号的电视接收机的观看者在与视频广播相关联的两个替代频道信号中的一个之间进行选择，而不需要修改电视接收机。该装置特别适用于使用双载波传输格式的电视广播。在一个实施例中使用新的变容二极管调谐装置来改变频率调制解调器的中心频率。所公开的装置还透明地允许能够进行这种立体声解调的电视接收机的立体声解调。

2. 发明申请

WO1990004901A1 VOICE SIGNAL DEMODULATION CIRCUIT 审中-公开
标题翻译：语音信号解调电路
公开(公告)号：WO1990004901A1
公开(公告)日：1990-05-03
申请号：PCT/JP1989001087
申请日：1989-10-24
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. , NIPPON HOSO KYOKAI , OKUMURA, Naoji , ARITA, Hisashi , NINOMIYA, Yuichi , OTSUKA, Yoshimichi , KAWASHIMA, Tadashi , IWAMOTO, Takushi
发明人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. , NIPPON HOSO KYOKAI
IPC分类号： H04N05/60
CPC分类号： H04N5/602 , H04N7/015 , H04N7/088
摘要： A circuit for demodulating digital voice signals consuming very small amounts of electric power. An external clock signal is subjected to frequency division to supply circuits with low-frequency clock pulses. Furthermore, provision is made of a logic circuit (1) which fixes the clock or the input data to the high level or to the low level during a period of other than the voice signals, the clock or the input data being input to the circuit that processes the signals of before the time axis is being extended in response to timing pulses generated in synchronism with the video signals.
摘要翻译：语音解调器电路消耗很少的电能。外部时钟信号被分频以向电路提供低频时钟脉冲。还提供了一个逻辑电路（1），它将时钟信号或输入数据设置为高电平或低电平一段不同于语音信号的周期。时钟信号或输入数据被注入到响应于与视频信号同步产生的时钟脉冲而在时间轴延长之前处理信号的电路中。

3. 发明申请

WO1996020561A1 COMBINED TV/FM RECEIVER 审中-公开
标题翻译：组合电视/ FM接收器
公开(公告)号：WO1996020561A1
公开(公告)日：1996-07-04
申请号：PCT/IB1995001119
申请日：1995-12-12
申请人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB
发明人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB , BREKELMANS, Johannes, Hubertus, Antonius
IPC分类号： H04N05/60
CPC分类号： H04B1/1646 , H04B1/26
摘要： An arrangement for receiving both TV and FM broadcast signals, particularly suited for multi-media applications, is described. In the arrangement a standard TV tuner (TUN) effects a first frequency conversion of an FM broadcast signal. A combination of a mixer (MP2) and an oscillator (VCO) effects a second frequency conversion of the FM broadcast signal. In order to keep the arrangement relatively simple, the following is proposed. The oscillator (VCO) is included in a phase-lock loop (PLL), which is used for synchronous detection of a TV intermediate frequency signal. The phase-lock loop (PLL) comprises a switch (SW) for de-activating the phase-lock loop (PLL) in the case of FM broadcast signal reception, such that the oscillator (VCO) is effectively free running.
摘要翻译：描述了用于接收TV和FM广播信号的装置，特别适用于多媒体应用。在这种布置中，标准TV调谐器（TUN）实现FM广播信号的第一频率转换。混合器（MP2）和振荡器（VCO）的组合实现FM广播信号的第二频率转换。为了保持相对简单的安排，提出如下。振荡器（VCO）包括在锁相环（PLL）中，用于对TV中频信号进行同步检测。在FM广播信号接收的情况下，锁相环（PLL）包括用于去激活锁相环（PLL）的开关（SW），使得振荡器（VCO）有效地自由运行。

4. 发明申请

WO1981000945A1 AUTOMATIC CIRCUIT AND METHOD FOR EDITING COMMERCIAL MESSAGES FROM TELEVISION SIGNALS 审中-公开
标题翻译：自动电路和电视信号编码商业信息的方法
公开(公告)号：WO1981000945A1
公开(公告)日：1981-04-02
申请号：PCT/US1980001201
申请日：1980-09-18
申请人： SHELTON VIDEO EDITORS INC
发明人： SHELTON VIDEO EDITORS INC , JOHNSTON H , KOOMBES M
IPC分类号： H04N05/60
CPC分类号： H04N17/06 , G11B27/024 , G11B2220/90 , Y10S358/908
摘要： In order to delete commercial messages during the viewing and/or video tape recording of broadcast television signals a control circuit (11) is disclosed for producing a commercial editing control signal at the beginning of one or more television commercial messages, which signal continues for the duration of such messages and terminates after the end of the last of such messages. The control circuit (11) incorporates detection circuitry (48) for automatically detecting each of a series of fade breaks in the video and audio components of the television signal, wherein such fade breaks normally mark the beginning and end of each of one or more commercial messages that have been inserted in the program content. The first of a series of detected fade breaks marks the beginning of a single commercial or the first commercial in a consecutive block of commercials, and succeeding fade breaks occur at time intervals that correspond to the durations of the commercial messages. Cooperating with the circuitry for detecting the series of fade breaks (48) is electrical timing circuitry (60) which is triggered to cause the generation of the above-mentioned editing control signal. The timing circuitry (60) has a time out interval that is selected to be just slightly longer than the maximum anticipated length of each of the consecutive commercial messages, and is retriggered each time another fade break is detected. A steady control signal is thus generated which continues until the timing circuitry (60) is allowed to time out because of the absence of detected fade breaks, indicating the resumption of non-commercial program content. In the form of the control circuitry disclosed herein, the automatically generated control signal is used to operate a pause control (22) on a video tape recorder for momentarily stopping the recorder during the occurrence of one or more consecutive commercial messages.

5. 发明申请

WO1996016511A1 DEVICE FOR AUTOMATIC ADAPTATION OF THE AVERAGE SOUND LEVEL OF A TELEVISION SET 审中-公开
标题翻译：用于自动适应电视机平均声级的装置
公开(公告)号：WO1996016511A1
公开(公告)日：1996-05-30
申请号：PCT/FR1994001366
申请日：1994-11-23
申请人： SAADOUN, Serge
IPC分类号： H04N05/60
CPC分类号： H04N5/60 , H03G3/3015
摘要： The device for adaptating automatically the average sound level of a television set comprises an adaptation module (100) having on the one hand a video adaptation circuit (130) comprising at least a high pass input filter (131, 134) and a fixed gain video amplifier (135, 132, 133) which are mounted in series and interposed in the video image processing circuits at video image signal read-out means, and on the other hand an audio adaptation circuit (110, 120) interposed in the sound path at audio signal read-out means, in order to detect the average input sound level, compare said average sound level to a preset average reference level, and adapt automatically the average output sound level in order to maintain the latter at the preset average reference level.
摘要翻译：用于自动适应电视机的平均声级的设备包括：自适应模块（100），其具有一方面包括至少包括高通输入滤波器（131,134）和固定增益视频的视频适配电路（130）放大器（135,132,133），其以视频图像信号读出装置串联安装在视频图像处理电路中，另一方面，插入声音路径中的音频适配电路（110,120）音频信号读出装置，为了检测平均输入声级，将所述平均声级与预设的平均参考电平进行比较，并自动适应平均输出声级，以便将后者保持在预设的平均参考电平。

6. 发明申请

WO1986005347A1 RECEIVER FOR TELEVISION BROADCASTS BY CABLE WITH A GATE CIRCUIT 审中-公开
标题翻译：通过电缆与电视电路接收电视广播
公开(公告)号：WO1986005347A1
公开(公告)日：1986-09-12
申请号：PCT/EP1986000057
申请日：1986-02-03
申请人： DEUTSCHE THOMSON-BRANDT GMBH
发明人： DEUTSCHE THOMSON-BRANDT GMBH , HARTMANN, Uwe , MAI, Udo , OHNEMUS, Fritz
IPC分类号： H04N05/60
CPC分类号： H04N5/10 , H04N5/60
摘要： The purpose of the gate circuit is to prevent reception of outside wireless communication services. Behind the intermediate frequency demodulator is mounted a pulse clipper (17) which delivers the line sync pulses to a filter circuit (18) tuned thereto which produces the signal to release the gate circuit.

7. 发明申请

WO1995002941A1 REMOTE CONTROL SYSTEM AND METHOD FOR CABLE TELEVISION SYSTEM 审中-公开
标题翻译：电视电视遥控系统及方法
公开(公告)号：WO1995002941A1
公开(公告)日：1995-01-26
申请号：PCT/US1994007313
申请日：1994-06-28
申请人： PACIFIC PAY VIDEO LIMITED
发明人： PACIFIC PAY VIDEO LIMITED , YAZOLINO, Lauren, F. , LEUNG, Ming, Sang
IPC分类号： H04N05/60
CPC分类号： H04H60/43 , H04H60/32 , H04N5/44582 , H04N5/60 , H04N7/16
摘要： Each television (120) in a cable television system has a multi-standard receiver for receiving television signals in predefined television signal formats. Hidden from the television viewer is a converter (104) coupling the respective television to a transmission cable (102). The only connection from the converter to the television is a cable connected to the television's cable or antenna input port (130). Each television includes a sensor (122) for receiving wireless command signals. The television's control circuitry (138) ignores wireless command signals not in a first defined set. The converter includes a sensor (132) for receiving a second defined set of wireless command signals. The converter's controller (156) ignores wireless command signals not in the second defined set. The converter's controller responds to wireless channel selection commands by tuning the frequency converter (158) to a respective television channel and/or by transmitting pay-per-view requests to the controller (112) at the head end of the system. A remote controller signal transmitter (126) includes a memory table (237) that stores command and signal format data to use when transmitting wireless commands. Some user commands are transmitted as wireless commands to the television, to the converter or at least one to both the television and the converter.
摘要翻译：有线电视系统中的每个电视机（120）具有用于以预定电视信号格式接收电视信号的多标准接收机。从电视观看者隐藏的是将各个电视机连接到传输电缆（102）的转换器（104）。从转换器到电视的唯一连接是连接到电视电缆或天线输入端口（130）的电缆。每个电视机包括用于接收无线命令信号的传感器（122）。电视的控制电路（138）忽略不在第一定义集合中的无线命令信号。转换器包括用于接收第二定义的一组无线命令信号的传感器（132）。转换器的控制器（156）忽略不在第二定义集合中的无线命令信号。转换器的控制器通过将频率转换器（158）调谐到相应的电视频道和/或通过在系统的前端传送按需付费的请求给控制器（112）来响应无线信道选择命令。遥控器信号发射器（126）包括存储表（237），其存储当发送无线命令时使用的命令和信号格式数据。一些用户命令作为无线命令被发送到电视机，转换器或至少一个到电视机和转换器。

8. 发明申请

WO1992014337A1 BROADCAST RECEIVER WITH A NICAM OR DAB DECODER 审中-公开
标题翻译：广播接收器与NICAM或DAB解码器
公开(公告)号：WO1992014337A1
公开(公告)日：1992-08-20
申请号：PCT/EP1992000125
申请日：1992-01-22
申请人： DEUTSCHE THOMSON-BRANDT GMBH , MACAREE, John, Patrick , EILTS-GRIMM, Klaus
发明人： DEUTSCHE THOMSON-BRANDT GMBH
IPC分类号： H04N05/60
CPC分类号： H04B1/1646
摘要： The invention relates to a broadcast receiver with a PSK demodulator (17) and an AGC circuit (1) for automatic gain control. The purpose of the invention is to provide a high-grade audio signal at the loudspeakers in a broadcast receiver of this kind on the preception of a modulated audio signal. According to the invention, the radio receiver has an AGC circuit (1) and a PSK demodulator (17) for demodulating a DAB or NICAM coded and modulated audio signal, whereby the demodulator being usually part of a DAB or NICAM decoder (16) and the AGC circuit being arranged in the path of the DAB or NICAM signal, and a control voltage for gain control can be derived from a demodulator output. The signals at the I and Q outputs of the demodulation filter of the QPSK demodulator preferably form the control voltages. Radio or TV receiver with DAB or NICAM decoder.

9. 发明申请

WO1989004576A1 SOUND CHANNEL CIRCUIT FOR DIGITAL TELEVISION RECEIVERS 审中-公开
标题翻译：数字电视接收机的声道电路
公开(公告)号：WO1989004576A1
公开(公告)日：1989-05-18
申请号：PCT/EP1987000682
申请日：1987-11-06
申请人： DEUTSCHE ITT INDUSTRIES GMBH , MEHRGARDT, Sönke , PFEIFER, Heinrich , HILPERT, Thomas
发明人： DEUTSCHE ITT INDUSTRIES GMBH
IPC分类号： H04N05/60
CPC分类号： H04N5/605
摘要： A circuit in conformity with all television sound transmission standards, including the so-called ''NICAM'' standard, comprises an analog anti-aliasing low-pass filter (af) fed with the mixture of analog audio and video signals (va) and connected upstream of the A/D converter (ad). The video signal is removed from its output signal by the filter structure (bp, dz, tp). The digital audio signal (ds) is transmitted to the phase splitter (ps) with a 0 DEG output (a0) and a 90 DEG output (a9), the two output signals from the phase splitter (ps) being transmitted to the phase discriminator (pd). The output (aa) of the latter emits the audio signal with demodulated amplitude. The phase output (ap) feeds the DQPSK partial decoder of the ''NICAM'' decoder (nd) and supplies the frequency-modulated audio signal through the differentiation stage (dt).
摘要翻译：符合所有电视声音传输标准的电路，包括所谓的“NICAM”标准，包括馈送模拟音频和视频信号（va）和混合信号的混合的模拟抗混叠低通滤波器（af）连接在A / D转换器（ad）的上游。视频信号通过滤波器结构（bp，dz，tp）从其输出信号中去除。数字音频信号（ds）以0°输出（a0）和90°输出（a9）传输到分相器（ps），来自分相器（ps）的两个输出信号被发送到相位鉴别器（PD）。后者的输出（aa）以解调幅度发出音频信号。相位输出（ap）馈送“NICAM”解码器（nd）的DQPSK部分解码器，并通过分化级（dt）提供调频音频信号。

10. 发明申请

WO1986005346A1 RECEIVER FOR TELEVISION BROADCAST BY CABLE WITH A GATE CIRCUIT 审中-公开
标题翻译：接收器通过电缆与门控电路进行电视广播
公开(公告)号：WO1986005346A1
公开(公告)日：1986-09-12
申请号：PCT/EP1986000056
申请日：1986-02-03
申请人： DEUTSCHE THOMSON-BRANDT GMBH
发明人： DEUTSCHE THOMSON-BRANDT GMBH , HARTMANN, Uwe , MAI, Udo , OHNEMUS, Fritz
IPC分类号： H04N05/60
CPC分类号： H04N5/60
摘要： The purpose of the gate circuit is to prevent reception of outside wireless communication services. Behind the intermediate frequency amplifier (3) is a pulse clipper (17) which delivers the line sync pulses each time to an input of a coincidence circuit (19) at one time direct and at another time delayed by a line period. The coincidence circuit delivers a signal to a constant power source (20), which charges a condensor (21) which is continually discharged by means of a second constant power source (22). The voltage arising in the condensor delivers the switching signal for the gate circuit.

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