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2. 发明公开

EP1873946A2 Multichannel spectral mapping audio apparatus and method 失效
标题翻译：多通道频谱映射音频设备和方法
公开(公告)号：EP1873946A2
公开(公告)日：2008-01-02
申请号：EP07018829.7
申请日：1997-09-15
申请人： BEARD, Terry D.
发明人： BEARD, Terry D.
IPC分类号： H04H5/00
CPC分类号： H04H20/88 , G10L19/008 , G10L19/167 , H04H20/48 , H04H20/89 , H04H60/04 , H04S5/005 , H04S5/02 , H04S2420/07
摘要： A method and circuit for deriving a set of multichannel audio signals (10) from a conventional monaural or stereo audio signals (1) uses an auxiliary multichannel spectral mapping data steam (90, 92). Audio can be played back in stereo and multichannel formats from a conventional stereo signal (40) on compact discs (88), FM radio, or other stereo or monaural delivery systems (5). The invention reduces the data rate needed for the transmission of multichannel digital audio.
摘要翻译：用于从常规单声道或立体声音频信号（1）导出一组多声道音频信号（10）的方法和电路使用辅助多声道频谱映射数据流（90,92）。音频可以通过传统的立体声信号（40）在光盘（88），FM收音机或其他立体声或单声道传输系统（5）上以立体声和多声道格式播放。本发明降低了多声道数字音频传输所需的数据速率。

3. 发明公开

EP1787409A2 CONFIGURABLE RECURSIVE DIGITAL FILTER FOR PROCESSING TELEVISION AUDIO SIGNALS 审中-公开
标题翻译：可配置递归数字滤波器，用于处理电视音频信号
公开(公告)号：EP1787409A2
公开(公告)日：2007-05-23
申请号：EP05790070.6
申请日：2005-08-16
申请人： THAT Corporation
发明人： BARNHILL, Matthew
IPC分类号： H04H5/00 , G06F17/00
CPC分类号： H04R5/04 , H04S1/007
摘要： A television audio signal encoder includes a device that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The device also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoder also includes a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal The set of filter coefficients is applied to the difference signal by a single multiplier in a recursive manner to prepare the difference signal for transmission

4. 发明授权

EP1201052B1 VERFAHREN ZUR AUFBEREITUNG VON QUELLCODIERTEN AUDIODATEN SOWIE SENDER UND EMPFANGER FÜR DIE DURCHFÜHRUNG DIESES VERFAHRENS 有权
标题翻译：方法用于实现IT处理数据源编码的音频和发送者和接收者
公开(公告)号：EP1201052B1
公开(公告)日：2007-02-28
申请号：EP00952869.6
申请日：2000-06-24
申请人： ROBERT BOSCH GMBH
发明人： HOFMANN, Frank , MLASKO, Torsten
IPC分类号： H04H1/00 , H04H5/00
CPC分类号： H04H20/88 , H04H2201/20
摘要： The invention concerns a method whereby the audio data of a source of useful signals (1) are separated (2) into a main dataflow (HD) and a secondary dataflow (ZD). The main dataflow (HD) contains at least as much information as required for a comprehensible reproduction of at least one source of useful signals (1). The main and secondary dataflows are transmitted in different channels (K1, K2) within a predefined range of channel attribution. The quality of signal reproduction can thus be enhanced within a predefined range of channel attribution.

5. 发明公开

EP0924962A4 ENCODING METHOD AND DEVICE, DECODING METHOD AND DEVICE, AND RECORDING MEDIUM 失效
标题翻译： KODIERUNGSVERFAHREN UND VORRICHTUNG，DEKODIERUNGSVERFAHREN UND VORRICHTUNG，UND AUFZEICHNUNGSMEDIUM
公开(公告)号：EP0924962A4
公开(公告)日：2006-05-31
申请号：EP98912767
申请日：1998-04-10
申请人： SONY CORP
发明人： SHIMOYOSHI OSAMU , TSUTSUI KYOYA
IPC分类号： G10L19/00 , G11B20/10 , H04H1/00 , H04H40/72 , H04S1/00 , H04H5/00
CPC分类号： H04H20/88 , G10L19/008 , G11B20/10 , H04H40/72 , H04S1/007
摘要： A recording medium for recording a code string comprising: encoded signals of an A-channel, i.e. (L+R)/2, generated from L- and R-channels; encoded signals of a B-channel, i.e. either one of L- and R-channels or (L-R)/2; channel constitution data which are the information for selecting B-channel signals; and encoding parameters. The A-channel is used for such signals that can be reproduced with a reproducing device of an old standard type and the B-channel is used for such signals that can be reproduced with a reproducing device of a new standard type. The reproducing device of a new standard type can reproduce both A- and B-channel signals. Encoding and decoding which realize multichannel devices by expanding the new standard while making possible the reproduction with the reproducing device of an old standard type, wherein the deterioration of tone quality is reduced by minimizing the quantization noise produced by encoding.
摘要翻译：记录代码串，其包括从L和R通道的信号产生的（L + R）/ 2的通道A的编码信号，L和R通道的信号中的任一个的编码信号或通道B （LR）/ 2，作为信道B的信号的选择信息的信道构成数据，以及编码参数。信道A信号是可以由以前的标准适应性再现装置再现的信号，信道B信号是可由新的标准适应型再现装置再现的信号。新的标准适应性再现装置能够再现信道A和B的信号。因此，在通过根据新标准的扩展实现多信道的编码和解码中，同时能够由前标准适应性再现装置，通过编码产生的量化噪声被抑制到最小水平，从而降低声音质量。

6. 发明公开

EP0967750A3 AM stereo receiver with reduced distortion 审中-公开
标题翻译：具有减少的失真调幅立体声接收机
公开(公告)号：EP0967750A3
公开(公告)日：2004-11-17
申请号：EP99304851.1
申请日：1999-06-21
申请人： Ford Motor Company
发明人： Whitecar, John Elliot , Whikehart, William J. , Hirschenberger, Frank Michael
IPC分类号： H04H5/00
CPC分类号： H04H20/49
摘要： Left and right stereo audio information is reproduced from a compatible quadrature amplitude modulation (C-QUAM) broadcast using two separate modes of detection. In the first mode, a true C-QUAM detection is performed when the signal being received has a high level of stereo difference information. In the second mode, a synchronous detection approximation is used which avoids generating an envelope signal or calculating a cosine correction factor as in true C-QUAM decoding. The second mode is used when over-modulation is present in the received signal.

7. 发明公开

EP1437713A1 ENCODING APPARATUS AND METHOD; DECODING APPARATUS AND METHOD AND RECORDING MEDIUM RECORDING APPARATUS AND METHOD 审中-公开
标题翻译：编码设备和方法，解码装置和方法以及记录介质，记录装置和方法
公开(公告)号：EP1437713A1
公开(公告)日：2004-07-14
申请号：EP02777800.0
申请日：2002-09-30
申请人： Sony Corporation
发明人： INOKUCHI, Tatsuya, SONY CORPORATION
IPC分类号： G10L19/00 , H04S1/00 , H04H5/00
CPC分类号： G10L19/008 , G11B20/00007 , G11B20/10527 , G11B20/18 , G11B2020/1062 , H04H20/88 , H04S1/007
摘要： An encoding method comprising the steps of forming a difference signal which is the difference between a first channel signal and a second channel signal of an input PCM signal, encoding the difference signal and the second channel signal with a time difference, dividing a signal which has been encoded with the time difference in the unit of a predetermined number of bits, adaptively encoding the divided data in the unit of the predetermined number of bits, and arranging the adaptively encoded data in a predetermined format.

8. 发明公开

EP1367746A1 Compression of audio signals in a FM transmitter 审中-公开
标题翻译：在einem FM发送者的压缩von Audiosignalen
公开(公告)号：EP1367746A1
公开(公告)日：2003-12-03
申请号：EP02011220.7
申请日：2002-05-21
申请人： Sony International (Europe) GmbH
发明人： Wildhagen, Jens, Advance Technology Center
IPC分类号： H04H5/00
CPC分类号： H04H20/48 , H04H20/88
摘要： A signal processing unit and a method for compressing audio signals are described. In order to avoid overmodulation, a compressed multiplex signal generated by a multiplexer with compression, and an uncompressed multiplex signal generated by a multiplexer without compression are blended to form a blended output signal. The respective contribution of the compressed multiplex signal and the uncompressed multiplex signal to the blended output signal is controlled by means of a blend control signal. Whenever an overmodulation of the compressed multiplex signal is detected, the contribution of said uncompressed multiplex signal is temporarily increased. Thus, it is possible to provide a peak reduction method which does not reduce the audio quality of the transmitted signal.
摘要翻译：描述信号处理单元和压缩音频信号的方法。为了避免过调制，混合由具有压缩的多路复用器产生的压缩多路复用信号和由未压缩的多路复用器产生的未压缩复用信号，以形成混合输出信号。通过混合控制信号来控制压缩复用信号和未压缩复用信号对混合输出信号的各自贡献。每当检测到压缩多路复用信号的过调制时，所述未压缩复用信号的贡献暂时增加。因此，可以提供不降低发送信号的音频质量的峰值降低方法。

9. 发明授权

EP0858067B1 Multichannel acoustic signal coding and decoding methods and coding and decoding devices using the same 失效
标题翻译：用于多通道声信号的编码和解码方法和设备
公开(公告)号：EP0858067B1
公开(公告)日：2003-01-02
申请号：EP98101892.2
申请日：1998-02-04
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Moriya, Takehiro Nippon Telegraph and Telephone Co , Mori, Takeshi, Nippon Telegraph and Telephone Co. , Ikeda, Kazunaga, Nippon Telegraph and Telephone Co , Iwakami, Naoki, Nippon Telegraph and Telephone Co.
IPC分类号： H04H1/00 , H04H5/00
CPC分类号： G10L19/008

10. 发明公开

EP1071232A1 Stereo multiplex-signal transmission with one single sideband modulation of the stereo-difference signal for frequency modulated broadcast system 审中-公开
标题翻译：立体声复用信号处理器Einseitenbandmodulation des Stereo-Differenzsignalsfürfrequencyenzmodulierten Rundfunksystem
公开(公告)号：EP1071232A1
公开(公告)日：2001-01-24
申请号：EP99114353.8
申请日：1999-07-21
申请人： Sony International (Europe) GmbH
发明人： Wildhagen, Jens, c/o Sony Internat.(Europe) GmbH
IPC分类号： H04H5/00
CPC分类号： H04H20/48
摘要： To increase the signal to noise ratio of a frequency-demodulated stereo audio signal the stereo-multiplex signal at the transmitter side is modified so that the information of the stereo-difference signal is carried in only one sideband of the amplitude modulated stereo-difference signal, preferably in the lower sideband. Therefore, receivers which generate the stereo-difference signal on basis of only the lower sideband produce a higher signal to noise ratio of the frequency demodulated stereo audio signal than conventional FM-stereo receivers, because the noise bandwidth is reduced and in case only the lower sideband carries the information of the stereo-difference signal also the noise power spectral density is reduced. Conventional FM-stereo-receivers reproduce the modified stereo-multiplex signal without increase or decrease in quality.
摘要翻译：为了提高频率解调立体声音频信号的信噪比，修改发射机侧的立体声多路复用信号，使得立体声差分信号的信息仅在幅度调制立体声差分信号的一个边带中传送，优选在下边带。因此，仅基于较低边带产生立体声差分信号的接收机产生比常规FM立体声接收机更高的频率解调立体声音频信号的信噪比，因为噪声带宽减小，并且只有较低的边带还携带立体声差分信号的信息，噪声功率谱密度也降低。传统的FM立体声接收机在不增加或降低质量的情况下再现修改后的立体声多路复用信号。

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