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131. 发明公开

EP0394491A4 VOICE SIGNAL DEMODULATION CIRCUIT 失效
标题翻译：语音信号解调电路
公开(公告)号：EP0394491A4
公开(公告)日：1992-12-09
申请号：EP89911613
申请日：1989-10-24
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD. , NIPPON HOSO KYOKAI
发明人： OKUMURA, NAOJI , MIYOSHI, TOSHIHIRO , NINOMIYA, YUICHI 17-4, TAKAISHI 2-CHOME , OHTSUKA,YOSHIMICHI 10-10, IKUTA 6-CHOME , KAWASHIMA, TADASHI , IWAMOTO, TAKUSHI
IPC分类号： H04N5/60 , H04B1/10 , H04B14/04 , H04N7/088 , H04B14/06
CPC分类号： H04N7/088 , H04B14/046

132. 发明公开

EP0417739A3 Speech coding apparatus using multimode coding 失效
标题翻译：语音编码设备使用多模式编码
公开(公告)号：EP0417739A3
公开(公告)日：1992-07-29
申请号：EP90117502.6
申请日：1990-09-11
申请人： FUJITSU LIMITED
发明人： Taniguchi, Tomohiko , Tanaka, Yoshinori , Sasama, Akira , Ohta, Yasuji , Amano, Fumio , Unagami, Shigeyuki
IPC分类号： H04L1/20 , H04B14/06
CPC分类号： G10L19/18 , H04L1/20
摘要： A speech coding apparatus coupled to a transmission channel includes m (m is an integer greater than 1) coders (1i-1m), m decoders (2 1 -2 m ) and m or (m - 1) error correcting coders (3 1 -3 m ). The apparatus also includes an evaluation unit which evaluates a quality of each of reproduced speech signals from the input speech signal and the reproduced speech signals and which outputs an evaluated quality of each of the reproduced speech signals. The quality of each of the reproduced speech signals is evaluated in a state having no transmission error. A decision unit (5) identifies one of the m coders which provides the reproduced speech signal having a smallest distortion on the basis of the evaluated quality of each of the reproduced speech signals, a current error rate of the transmission channel and error correcting abilities of the error correcting coders, and generates a coder identification number representative of a selected one of the m coders. An output part (6, 7) outputs a multiplexed transmission signal including the coded speech signal generated by the one of the m coders identified by the decision unit and the error correcting code generated by a corresponding one of the m error correcting coders.

133. 发明公开

EP0486232A2 ADPCM decoder with error detection 失效
标题翻译： ADPCM-Dekoder mit Fehlererkennung。
公开(公告)号：EP0486232A2
公开(公告)日：1992-05-20
申请号：EP91310361.0
申请日：1991-11-08
申请人： TEXAS INSTRUMENTS INCORPORATED , TEXAS INSTRUMENTS LIMITED
发明人： Dent, Peter Richard
IPC分类号： H04B14/06
CPC分类号： H04B14/068
摘要： Decoding apparatus for decoding received ADPCM data signals includes means for quickly detecting errors in the data values in the form of unallocated values or values which are unlikely to occur. The apparatus is intended for use in cordless telephones to eliminate extraneous and disturbing sound signals which can be generated by the decoding apparatus when the signals received by the telephone become weak and are misread before a cyclic redundancy check circuit detects the error.
摘要翻译：用于解码所接收的ADPCM数据信号的解码装置包括以不可能发生的未分配值或值的形式快速检测数据值中的错误的装置。该装置旨在用于无绳电话，以消除当电话接收到的信号变弱并且在循环冗余校验电路检测到错误之前被误读时由解码装置产生的无关和干扰的声音信号。

134. 发明授权

EP0187185B1 Anordnung zur Vermittlung von Deltamodulationssignalen 失效
标题翻译：用于调制信号的开关装置
公开(公告)号：EP0187185B1
公开(公告)日：1991-10-09
申请号：EP85104964.3
申请日：1985-04-24
申请人： SIEMENS-ALBIS AKTIENGESELLSCHAFT
发明人： Hagger, Hansjost, Dr.
IPC分类号： H04B14/06 , H03M7/32
CPC分类号： H03M7/3048 , H04B14/062

135. 发明公开

EP0417739A2 Speech coding apparatus using multimode coding 失效
标题翻译： Sprachkodierungsgerätmit mehreren Kodierungsverfahren。
公开(公告)号：EP0417739A2
公开(公告)日：1991-03-20
申请号：EP90117502.6
申请日：1990-09-11
申请人： FUJITSU LIMITED
发明人： Taniguchi, Tomohiko , Tanaka, Yoshinori , Sasama, Akira , Ohta, Yasuji , Amano, Fumio , Unagami, Shigeyuki
IPC分类号： H04L1/20 , H04B14/06
CPC分类号： G10L19/18 , H04L1/20
摘要： A speech coding apparatus coupled to a transmission channel includes m (m is an integer greater than 1) coders (1i-1m), m decoders (2 1 -2 m ) and m or (m - 1) error correcting coders (3 1 -3 m ). The apparatus also includes an evaluation unit which evaluates a quality of each of reproduced speech signals from the input speech signal and the reproduced speech signals and which outputs an evaluated quality of each of the reproduced speech signals. The quality of each of the reproduced speech signals is evaluated in a state having no transmission error. A decision unit (5) identifies one of the m coders which provides the reproduced speech signal having a smallest distortion on the basis of the evaluated quality of each of the reproduced speech signals, a current error rate of the transmission channel and error correcting abilities of the error correcting coders, and generates a coder identification number representative of a selected one of the m coders. An output part (6, 7) outputs a multiplexed transmission signal including the coded speech signal generated by the one of the m coders identified by the decision unit and the error correcting code generated by a corresponding one of the m error correcting coders.
摘要翻译：耦合到传输信道的语音编码装置包括m（m是大于1的整数）编码器（11-1m），m个解码器（21-2m）和m或（m-1）个纠错编码器（31-3m）。该装置还包括评估单元，其从输入的语音信号和再现的语音信号中评估每个再现语音信号的质量，并且输出每个再现的语音信号的评估质量。在没有传输错误的状态下评估每个再现的语音信号的质量。判定单元（5）基于每个再现的语音信号的评估质量，传输信道的当前错误率和错误校正能力来识别提供具有最小失真的再现语音信号的m个编码器之一纠错编码器，并产生代表所选m个编码器之一的编码器标识号。输出部（6,7）输出包含由判定单元识别的m个编码器之一生成的编码语音信号的复用发送信号和由m个纠错编码器中的相应一个生成的纠错码。

136. 发明公开

EP0228696A3 ADPCM CODER-DECODER INCLUDING PARTIAL BAND ENERGY TRANSITION DETECTION 失效
标题翻译： ADPCM编码器解码器，包括部分能量过渡检测
公开(公告)号：EP0228696A3
公开(公告)日：1988-11-23
申请号：EP86117955
申请日：1986-12-23
申请人： AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人： BENVENUTO, NEVIO , BERTOCCI, GUIDO
IPC分类号： H04B14/06 , H03M3/04 , H03M7/38
CPC分类号： H03M3/042
摘要： In an ADPCM coder l00 and decoder including a so-called locking-unlocking adaptation speed control l06, the adaptation speed is locked to a very slow, almost constant, speed of adaptation for voiceband data and partial band energy signals, i.e., tones and tone like signals, and is unlocked to achieve a fast speed of adaptation for speech. When a so-called partial band energy signal is being inputted, the adaptation speed is biased (via l06) toward the unlocked state and when a transition occurs from a partial band energy signal to another such signal, the adaptation speed is set to the totally unlocked state and coefficients of an adaptive predictor l02 are set to prescribed values. This is done in both the coder and decoder to minimize generation of impulse noise in the decoder output.
摘要翻译：在包括所谓的锁定解锁自适应速度控制的ADPCM编码器和解码器中，自适应速度被锁定到语音频带数据和部分频带能量信号（即音调和音调信号）的非常慢，几乎恒定的适应速度并且被解锁以实现用于语音的快速适应速度。当输入所谓的部分频带能量信号时，自适应速度被偏向于解锁状态，并且当从部分频带能量信号到另一个这样的信号发生转变时，自适应速度被设置为完全解锁状态，系数的自适应预测器被设置为规定的值。这在编码器和解码器中完成，以最小化解码器输出中的脉冲噪声的产生。

137. 发明公开

EP0165014A3 Sampling rate converter for delta modulated signals 失效
标题翻译：用于DELTA调制信号的采样率转换器
公开(公告)号：EP0165014A3
公开(公告)日：1988-06-08
申请号：EP85303983
申请日：1985-06-05
申请人： DOLBY LABORATORIES LICENSING CORPORATION
发明人： Lagadec, Roger, Dr.
IPC分类号： H03M03/02 , H04B14/06
CPC分类号： H03M7/3048 , H04B14/062
摘要： In the conversion of a first delta modulated signal with a first bit rate into a second delta modulated signal with a second bit rate, first and second digital signals derived from the first and second delta modulated signals respectively are compared in an adding circuit (58), which is followed by a digital integration circuit (55) and a 1-bit quantizer (57) providing the second delta modulated signal. In this way an analog intermediary signal can be avoided and the circuit complexity is small. In another embodiment, using an analog intemediary signal, the adding circuit is followed by an analog integrator, an analog comparator and a sample and hold circuit providing the second delta modulated signal. In a third embodiment the first and second digital signals are PCM signals derived by digital integration of the first and second delta modulated signals, with sampling frequency conversion to match the PCM sampling frequencies.

138. 发明授权

EP0113291B1 Procédé et dispositif d'interpolation de la parole dans un système de transmission de parole numérisée 失效
标题翻译：语音插入方法和设备在数字语音传输系统中的应用
公开(公告)号：EP0113291B1
公开(公告)日：1988-05-18
申请号：EP83402525.6
申请日：1983-12-23
申请人： THOMSON-CSF
发明人： Potage, Jean , Sidin, Philippe
IPC分类号： H04B14/06 , H04L27/14
CPC分类号： H04B14/062 , H04L27/14

139. 发明授权

EP0091979B1 Range-predictive code modulation method with signal-adaptive bit-rate reduction 失效
标题翻译：具有信号自适应位速率减少的范围预测代码调制方法
公开(公告)号：EP0091979B1
公开(公告)日：1986-12-30
申请号：EP82103296
申请日：1982-04-20
申请人： KEHLER, WALDEMAR, DIPL.-ING.
发明人： KEHLER, WALDEMAR, DIPL.-ING.
IPC分类号： H04B14/06 , H04N7/32 , H04N7/13
CPC分类号： H04B14/068 , H04N19/124 , H04N19/50

140. 发明授权

EP0099397B1 ADAPTIVE DIFFERENTIAL PCM CODING 失效
标题翻译：自适应差分PCM编码
公开(公告)号：EP0099397B1
公开(公告)日：1986-09-17
申请号：EP83900589.9
申请日：1983-01-14
申请人： Western Electric Company, Incorporated
发明人： PETR, David Warren
IPC分类号： H03M3/04 , H04B14/06
CPC分类号： H04B14/068

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