公开(公告)号：US07200852B1

公开(公告)日：2007-04-03

申请号：US08697542

申请日：1996-08-27

申请人： Robert S. Block

发明人： Robert S. Block

IPC分类号： H04N7/16

CPC分类号： H04N7/088 ,  H04N5/44 ,  H04N5/60 ,  H04N7/06 ,  H04N7/08 ,  H04N7/163 ,  H04N9/8205 ,  H04N21/4542

摘要： A method and apparatus for information labeling and control includes central station equipment which combines a program signal with content labels which separately and continuously identify the audio, video, and data content of the program signal, and user station equipment which generates a local content label identifying program material which is acceptable to the user. By comparing the two labels the user station equipment can block or substitute alternative audio, video, or data for offensive portions of a program signal received through a transmission or stored for playback on various media such as video tapes, audio tapes, CDs, computer disks, optical storage media, and video game cartridges. Exemplary embodiments of the invention also relate to a method and apparatus for creating the local content label.

摘要翻译： 用于信息标签和控制的方法和装置包括将节目信号与分别连续地识别节目信号的音频，视频和数据内容的内容标签组合的中央站设备，以及生成本地内容标签识别的用户站设备 程序材料是用户可以接受的。 通过比较两个标签，用户站设备可以阻止或替换替代音频，视频或数据，用于通过传输接收的节目信号的令人反感的部分，或者存储在各种媒体上，例如录像带，音频磁带，CD，计算机磁盘 ，光学存储介质和视频游戏盒。 本发明的示例性实施例还涉及用于创建本地内容标签的方法和装置。

公开(公告)号：US20070003070A1

公开(公告)日：2007-01-04

申请号：US11288418

申请日：2005-11-29

申请人： Hiroyuki Hayashita

发明人： Hiroyuki Hayashita

IPC分类号： H04R29/00 ,  H04N7/00

CPC分类号： H04N7/06 ,  H04N5/607 ,  H04N21/4382 ,  H04N21/44209 ,  H04N21/8106

摘要： A signal detection device is composed of a SAP detecting circuit that outputs a voltage corresponding to the level of a SAP signal; a noise detecting circuit that outputs a voltage corresponding to the level of a noise component; a SAP signal detection comparator that is capable of changing, if the level of a SIF signal is reduced, a reference bias according to that level and that determines whether there is a SAP signal based on the reference bias; a noise detection comparator that determines whether there is a noise component; and a SAP detection signal generating circuit that uniformly outputs, if the noise detection comparator determines that there is noise, a signal indicating that there is no SAP signal.

摘要翻译： 信号检测装置由输出与SAP信号的电平对应的电压的SAP检测电路构成; 噪声检测电路，其输出与噪声分量的电平对应的电压; SAP信号检测比较器，如果SIF信号的电平降低，则能够根据该电平改变参考偏置，并且基于参考偏置来确定是否存在SAP信号; 确定是否存在噪声分量的噪声检测比较器; 以及SAP检测信号发生电路，如果噪声检测比较器确定存在噪声，则均匀地输出指示没有SAP信号的信号。

公开(公告)号：US06798738B1

公开(公告)日：2004-09-28

申请号：US09509676

申请日：2000-07-25

申请人： Sang-hyun Do ,  Hyung-jin Choi ,  Hong-bae Cho

发明人： Sang-hyun Do ,  Hyung-jin Choi ,  Hong-bae Cho

IPC分类号： H04J1100

CPC分类号： H04L27/2665 ,  H04L27/2662 ,  H04N7/06

摘要： A fast Fourier transform (FFT) window position recovery apparatus in an orthogonal frequency division multiplexing (OFDM) receiver is provided. This apparatus, in an OFDM system receiver which receives an OFDM symbol comprised of a useful data interval and a guard interval and recovers a FFT window position, includes: an analog-to-digital converter (ADC) for converting a received OFDM signal into a digital complex sample; a symbol start detector for detecting a power difference between the digital complex samples output by the ADC and detecting a position having a minimum absolute value of the power difference between the samples, as a symbol starting position; and a FFT window controller for activating FFT by moving the FFT window position using symbol start information detected by the symbol start detector. The influence of frequency and phase offsets is reduced by using the power difference between adjacent samples delayed by the useful data interval, thus improving the reliability of a system.

摘要翻译： 提供了一种正交频分复用（OFDM）接收机中的快速傅里叶变换（FFT）窗口位置恢复装置。 该装置在接收包括有用数据间隔和保护间隔并恢复FFT窗口位置的OFDM符号的OFDM系统接收机中包括：模数转换器（ADC），用于将接收的OFDM信号转换为 数字复杂样本; 符号起始检测器，用于检测由ADC输出的数字复样本之间的功率差，并检测具有样本之间的功率差的最小绝对值的位置作为符号开始位置; 以及FFT窗口控制器，用于通过使用由符号开始检测器检测的符号开始信息移动FFT窗口位置来激活FFT。 通过使用延迟有用数据间隔的相邻采样之间的功率差来降低频率和相位偏移的影响，从而提高系统的可靠性。

公开(公告)号：US06785817B2

公开(公告)日：2004-08-31

申请号：US10370835

申请日：2003-02-21

申请人： Kinney C. Bacon ,  R. Thomas Haman ,  David B. Lett ,  Robert O. Banker ,  Michael P. Harney

发明人： Kinney C. Bacon ,  R. Thomas Haman ,  David B. Lett ,  Robert O. Banker ,  Michael P. Harney

IPC分类号： G06F1130

CPC分类号： H04N7/1675 ,  G06F8/60 ,  H04N5/44 ,  H04N5/445 ,  H04N5/44504 ,  H04N5/44543 ,  H04N5/45 ,  H04N5/60 ,  H04N7/025 ,  H04N7/03 ,  H04N7/06 ,  H04N7/08 ,  H04N7/088 ,  H04N7/163 ,  H04N7/165 ,  H04N7/173 ,  H04N21/4181 ,  H04N21/4184 ,  H04N21/4432 ,  H04N21/4435 ,  H04N21/4586 ,  H04N21/47202 ,  H04N21/4884 ,  H04N21/6547 ,  H04N21/8166

摘要： A reprogrammable subscriber terminal of a subscription television service which can have the control program code of its control processor modified by downloading new program code from the headend. The control processor stores a boot program in an internal read only memory. Upon start up and resets, the boot program determines whether the control program should be changed from a command sent from the headend. The command, termed a parameters transactions, includes the number of expected download program code transactions required to complete the control code modification, the memory space areas where the code is to be loaded, and the channel over which the download program code transactions are to be transmitted. The channel is tuned and when the boot program receives all the download program code transactions accurately and stores them, the boot program will cause the control program to be restarted at a selected address of the new or modified control program code which has been downloaded. The boot program may download code to different configurations of subscriber terminals including those with Flash EPROM or extended memories from plug-in expansion modules.

公开(公告)号：US20030161477A1

公开(公告)日：2003-08-28

申请号：US10083052

申请日：2002-02-26

发明人： David Chaohua Wu ,  Hoang Nhu ,  Russ Lambert ,  Alexander G. MacInnis ,  Ronald Crochiere

IPC分类号： H04H005/00 ,  H04R005/00

CPC分类号： H04N7/06 ,  H04H20/48 ,  H04N5/602 ,  H04N5/607 ,  H04N21/8106 ,  H04N21/85406 ,  H04R5/04

摘要： A system and method are disclosed for performing digital multi-channel decoding of a BTSC composite audio signal. Each subsequent stage of the digital multi-channel decoding process is performed at the lowest sampling rate that yields acceptable performance for that stage. Analog-to-digital conversion of the composite audio signal is performed first to generate a composite digital audio signal. After analog-to-digital conversion, all signal processing may be performed in the digital domain. The composite digital audio signal is digitally filtered to frequency compensate for variations caused by previous stages of processing, including IF demodulation. Digital channel demodulation and filtering are performed to isolate single channels of the composite digital audio signal such as SAP, LnullR, and LnullR channels. SAP and LnullR channels are DBX decoded resulting in corresponding decoded signals using a unique combination of digital filters that are an efficient translation of a corresponding combination of analog filters. The decoded LnullR channel and the LnullR channel are re-matrixed to form left and right stereo signals. Any of the SAP signal, left and right stereo signals, and LnullR channel signal may be sample rate converted and output at a standard audio output rate.

摘要翻译： 公开了一种用于对BTSC复合音频信号执行数字多声道解码的系统和方法。 数字多通道解码过程的每个后续阶段以最低的采样率执行，该阶段产生可接受的性能。 首先执行复合音频信号的模数转换以产生复合数字音频信号。 在模数转换之后，可以在数字域中执行所有的信号处理。 复合数字音频信号被数字滤波，以对由先前的处理阶段（包括IF解调）引起的变化进行频率补偿。 执行数字信道解调和滤波以隔离诸如SAP，L-R和L + R信道的复合数字音频信号的单个信道。 SAP和L-R通道被DBX解码，从而产生相应的解码信号，其使用数字滤波器的独特组合，其是模拟滤波器的相应组合的有效转换。 解码的L-R信道和L + R信道被重新矩阵化以形成左和右立体声信号。 SAP信号，左立体声信号和右立体声信号以及L + R信道信号中的任何一个可以采样率转换并以标准音频输出速率输出。

公开(公告)号：US6037993A

公开(公告)日：2000-03-14

申请号：US38740

申请日：1998-03-11

申请人： Matthew Frank Easley

发明人： Matthew Frank Easley

IPC分类号： H03G7/00 ,  H04N5/60 ,  H04N7/06 ,  H04R5/04 ,  H04N7/08

CPC分类号： H03G7/007 ,  H04N21/8106 ,  H04N5/607 ,  H04N7/06 ,  H04R5/04

摘要： An apparatus for generating a broadcast television stereo signal has a left channel and a right channel. An analog-to-digital converter converts the right-channel signal to a right digital signal and the left-channel to a left digital signal. A circuit, which could include a digital signal processing chip, generates a first signal that includes the right digital signal added to the left digital signal and generates a second signal that includes the right digital signal subtracted from the left digital signal. The circuit also generates a digitally pre-emphasized first signal, which includes digital pre-emphasis, and a digitally pre-emphasized second signal, which also includes digital pre-emphasis. The circuit transforms the pre-emphasized first signal to a digital BTSC L+R signal and transforms the pre-emphasized second signal to a digital BTSC L-R signal. A digital-to-analog converter converts the digital BTSC L+R signal to an analog BTSC L+R signal and the digital BTSC L-R signal to an analog BTSC L-+R signal. The analog BTSC L+R and L-R signals are then modulated onto a carrier wave.

摘要翻译： 用于产生广播电视立体声信号的装置具有左声道和右声道。 模拟 - 数字转换器将右声道信号转换为右数字信号，将左声道转换为左数字信号。 可以包括数字信号处理芯片的电路产生包括添加到左数字信号的右数字信号的第一信号，并产生包括从左数字信号中减去的右数字信号的第二信号。 电路还产生包括数字预加重的数字预先强调的第一信号和还包括数字预加重的数字预先强调的第二信号。 电路将预先强调的第一信号变换为数字BTSC L + R信号，并将预先强调的第二信号转换为数字BTSC L-R信号。 数模转换器将数字BTSC L + R信号转换为模拟BTSC L + R信号，数字BTSC L-R信号转换为模拟BTSC L- + R信号。 模拟BTSC L + R和L-R信号然后被调制到载波上。

公开(公告)号：US5953067A

公开(公告)日：1999-09-14

申请号：US918754

申请日：1997-08-25

申请人： Sealtiel Avalos ,  Ken Kaylor ,  Robert Kaylor ,  Robert Kessler

发明人： Sealtiel Avalos ,  Ken Kaylor ,  Robert Kaylor ,  Robert Kessler

IPC分类号： H04N5/40 ,  G11B27/10 ,  G11B27/28 ,  H04B1/62 ,  H04H5/00 ,  H04H20/89 ,  H04N5/14 ,  H04N5/60 ,  H04N7/08 ,  H04N7/081 ,  H04S3/00 ,  H04N7/04

CPC分类号： H04H20/89 ,  G11B27/105 ,  G11B27/28 ,  H04N7/06 ,  H04S3/00 ,  G11B2220/2562 ,  H04N5/147

摘要： The present invention provides an apparatus that transmits the stereo and the surround sound information of the L-R signal without excessive attenuation at the higher frequencies in order to allow transmission of surround sound through a noisy medium. The apparatus includes a surround sound conditioner coupled to receive a L-R signal portion of the television signal for pre-emphasizing and companding the L-R signal to produce a conditioned L-R signal; a mixer coupled to the surround sound conditioner for switching the conditioned L-R signal at a predetermined value to produce an amplitude modulated L-R signal; and a synchronizing circuitry coupled to the mixer for maintaining the predetermined value in step with the reference value, wherein the mixed L-R signal is combined with a L+R signal portion of the television signal to produce a composite output signal. Furthermore, a method of transmitting stereo and surround sound in accordance with multichannel television sound protocol includes the steps of preconditioning a L-R signal; synchronizing the preconditioned L-R signal to a reference value to produce a synchronized L-R signal; and mixing the synchronized L-R signal with a L+R signal to produce a composite output signal.

摘要翻译： 本发明提供了一种在较高频率下传输L-R信号的立体声和环绕声信息而没有过度衰减的装置，以便允许通过噪声介质传播环绕声。 该装置包括耦合以接收电视信号的L-R信号部分的环绕声调节器，用于预加重和压缩L-R信号以产生经调节的L-R信号; 耦合到环绕声调节器的混频器，用于以预定值切换经调节的L-R信号以产生调幅的L-R信号; 以及耦合到所述混频器的同步电路，用于将所述预定值与所述参考值一起维持，其中所述混合L-R信号与所述电视信号的L + R信号部分组合以产生复合输出信号。 此外，根据多声道电视声音协议发送立体声和环绕声的方法包括预处理L-R信号的步骤; 将预处理的L-R信号同步到参考值以产生同步的L-R信号; 并且将同步的L-R信号与L + R信号混合以产生复合输出信号。

公开(公告)号：US5896555A

公开(公告)日：1999-04-20

申请号：US831376

申请日：1997-04-01

申请人： Hitoshi Yoshinobu

发明人： Hitoshi Yoshinobu

IPC分类号： H04H20/28 ,  H04H20/30 ,  H04H60/13 ,  H04H60/39 ,  H04H60/74 ,  H04H60/94 ,  H04M1/2745 ,  H04N5/44 ,  H04N5/445 ,  H04N7/06 ,  H04N7/173

CPC分类号： H04N7/17309 ,  H04H20/28 ,  H04H20/30 ,  H04H40/18 ,  H04H60/13 ,  H04H60/74 ,  H04H60/94 ,  H04N21/4758 ,  H04N21/6112 ,  H04N21/6187 ,  H04N5/44 ,  H04N7/06 ,  H04H60/39 ,  H04M1/2745 ,  H04N5/445

摘要： A multiplex broadcasting system and a multiplex broadcast signal receiver for receiving multiplex broadcast signals. composes second broadcast information of multi-frequency signals each of a combination of one tone in a first frequency group of audio bands unrelated with each other in articulation and one tone in a second frequency group of audio bands unrelated with each other in articulation, and multiplexes the second broadcast information and main broadcast audio signals. The multiplex broadcast signal receiver includes a decoder for continuously monitoring the audio signal included in the received multiplex broadcast signal, detecting multi-frequency signals to identify the combination of the multi-frequency signals, a receiver for receiving the output of the decoder as second broadcast information, and a memory for storing the second broadcast information. The stored second broadcast information is used automatically for accessing a two-way program involving the viewers.

摘要翻译： 一种用于接收多路复用广播信号的多路广播系统和多路广播信号接收机。 构成多个频率信号的第二广播信息，每个音频信号在关节中彼此无关的音频频带的第一频率组中的一个音调的组合和在关节中彼此无关的音频频带的第二频率组中的一个音调组合，并且多路复用 第二广播信息和主广播音频信号。 多路复用广播信号接收机包括：解码器，用于连续地监视接收到的多路复用广播信号中包括的音频信号，检测多频信号以识别多频信号的组合;接收机，用于接收解码器的输出作为第二广播 信息和用于存储第二广播信息的存储器。 存储的第二广播信息被自动地用于访问涉及观众的双向节目。

公开(公告)号：US5677739A

公开(公告)日：1997-10-14

申请号：US398165

申请日：1995-03-02

申请人： C. Eric Kirkland

发明人： C. Eric Kirkland

IPC分类号： G09B21/00 ,  H04N5/073 ,  H04N5/445 ,  H04N5/60 ,  H04N7/06 ,  H04N7/088 ,  H04N21/488 ,  H04N7/08

CPC分类号： H04N21/4884 ,  G09B21/006 ,  H04N5/44513 ,  H04N5/60 ,  H04N7/06 ,  H04N7/0885 ,  H04N7/0887 ,  H04N5/073

摘要： An apparatus for providing described television services includes a computer for receiving and storing description data corresponding to an audiovisual program; an encoder for encoding the description data into a program signal corresponding to the audiovisual program; and a receiver which receives the encoded program signal and extracting the description data from the encoded program signal. A text-to-speech converter converts the description data into a speech signal corresponding to the description data, and a speaker provides the speech signal to a viewer. Similarly, a method for providing described television services includes the steps of generating description data corresponding to an audiovisual program; encoding the description data into a program signal of the audiovisual program; and decoding the encoded program signal, whereby the description data is extracted from said encoded program signal. Once the description data is extracted, the description data is converted into a speech signal corresponding to the description data, and the speech signal is provided to a viewer.

摘要翻译： 一种用于提供所描述的电视服务的装置，包括用于接收和存储对应于视听节目的描述数据的计算机; 用于将所述描述数据编码成对应于所述视听节目的节目信号的编码器; 以及接收器，其接收编码的程序信号并从编码的程序信号中提取描述数据。 文本到语音转换器将描述数据转换成对应于描述数据的语音信号，并且扬声器向观看者提供语音信号。 类似地，用于提供所描述的电视服务的方法包括以下步骤：产生对应于音像节目的描述数据; 将描述数据编码成音像节目的节目信号; 并对编码的程序信号进行解码，由此从所述编码的程序信号中提取描述数据。 一旦提取了描述数据，就将该描述数据转换为对应于描述数据的语音信号，并将该语音信号提供给观众。

公开(公告)号：US5649284A

公开(公告)日：1997-07-15

申请号：US355132

申请日：1994-12-13

申请人： Hitoshi Yoshinobu

发明人： Hitoshi Yoshinobu

IPC分类号： H04H20/28 ,  H04H20/30 ,  H04H60/13 ,  H04H60/39 ,  H04H60/74 ,  H04H60/94 ,  H04M1/2745 ,  H04N5/44 ,  H04N5/445 ,  H04N7/06 ,  H04N7/173

CPC分类号： H04N7/17309 ,  H04H20/28 ,  H04H20/30 ,  H04H40/18 ,  H04H60/13 ,  H04H60/74 ,  H04H60/94 ,  H04N21/4758 ,  H04N21/6112 ,  H04N21/6187 ,  H04N5/44 ,  H04N7/06 ,  H04H60/39 ,  H04M1/2745 ,  H04N5/445

摘要： The present invention provides a multiplex broadcasting system and a multiplex broadcast signal receiver for receiving multiplex broadcast signals. The multiplex broadcasting system composes second broadcast information of multi-frequency signals each of a combination of one tone in a first frequency group of audio bands unrelated with each other in articulation and one tone in a second frequency group of audio bands unrelated with each other in articulation, and multiplexes the second broadcast information and main broadcast audio signals. The multiplex broadcast signal receiver comprises decoding means for continuously monitoring the audio signal included in the received multiplex broadcast signal, detecting multi-frequency signals to identify the combination of the multi-frequency signals, receiving means for receiving the output of the decoding means as second broadcast information, and storage means for storing the second broadcast information. The stored second broadcast information is used automatically for accessing a two-way program involving the viewers.

摘要翻译： 本发明提供一种用于接收多路广播信号的多路复用广播系统和多路广播信号接收机。 多路复用广播系统构成多频率信号的第二广播信息，每个频率信号是在关节中彼此无关的音频频带的第一频率组中的一个音调的组合和在彼此无关的音频频带的第二频率组中的一个音调的组合 并且多路复用第二广播信息和主广播音频信号。 多路复用广播信号接收机包括用于连续监视接收到的多路复用广播信号中包括的音频信号的解码装置，检测多频信号以识别多频信号的组合;接收装置，用于接收解码装置的输出为第二 广播信息和用于存储第二广播信息的存储装置。 存储的第二广播信息被自动地用于访问涉及观众的双向节目。