Audio bitstream data structure arrangement of a lossy encoded signal together with lossless encoded extension data for said signal
    1.
    发明公开
    Audio bitstream data structure arrangement of a lossy encoded signal together with lossless encoded extension data for said signal 审中-公开
    与无损扩展用于这种信号编码数据的有损编码信号的音频位流的数据结构。

    公开(公告)号:EP1881485A1

    公开(公告)日:2008-01-23

    申请号:EP06117375.3

    申请日:2006-07-18

    IPC分类号: G10L19/00 G10L19/14

    CPC分类号: G10L19/167

    摘要: Lossless compression algorithms can only exploit redundancies of the original audio signal to reduce the data rate, but not irrelevancies as identified by psycho-acoustics. Lossless audio coding schemes apply a filter or transform for de-correlation and then encode the transformed signal. The encoded bit stream comprises the parameters of the transform or filter, and the lossless representation of the transformed signal. However, in case of lossy based lossless coding the additional amount of information exceeds the amount of data for the base layer by a multiple of the base layer data amount. Therefore the additional data cannot be packed completely into the base layer data stream e.g. as ancillary data. Several intermediate quality layers are possible. However, these data streams are not independent from each other. Every higher layer depends on the lower layers and can only be reasonably decoded in combination with these lower layers. According to the invention, a special combination of one-time header information with repeated header information in a block structure is used, which kind of combination depends on the type of application. Assignment information data identify the different parts or layers of the lossless format belonging to one input signal. Synchronisation data are used to combine the different data streams or parts or layers to a single lossless or intermediate output signal. These features are used in a file format and in a streaming format.

    摘要翻译: 通过心理声学所识别的无损压缩算法仅可以利用原始音频信号的冗余以减小数据速率,但不是不相干。 无损音频编码方案应用过滤器或变换来解相关和编码然后转化的信号。 编码比特流包括:变换或滤波器的参数,以及变换后的信号的无损表示。 然而,在基于有损的无损编码的信息的附加量的情况下,由基本层数据量的倍数超过了基础层数据的量。 THEREFORE附加数据不能被完全填充的呼叫接入到基本层数据流E.G. 作为辅助数据。 若干中间质量层是可能的。 但是,论文的数据流不是独立的海誓山盟。 每个上层依赖于下层,并且只能在用合成较低层相结合来合理解码。 。根据本发明,与在块结构重复报头信息的一次性报头信息的特定组合被使用,其种类组合的依赖于应用的类型。 分配信息数据识别不同的部件或属于一个输入信号的无损格式的层。 同步数据被用于不同数据流或部分或层组合到单个无损或中间输出信号。 这些功能在文件格式和流格式使用。

    Method and apparatus for lossless encoding of a source signal, using a lossy encoded data stream and a lossless extension data stream
    2.
    发明公开
    Method and apparatus for lossless encoding of a source signal, using a lossy encoded data stream and a lossless extension data stream 审中-公开
    方法和装置,用于在源信号的无损编码,使用有损编码的数据流和无损扩展数据流

    公开(公告)号:EP1852849A1

    公开(公告)日:2007-11-07

    申请号:EP06113596.8

    申请日:2006-05-05

    IPC分类号: G10L19/00 G10L19/14

    摘要: In lossy based lossless coding a PCM audio signal passes through a lossy encoder (101) to a lossy decoder (102). The lossy encoder provides a lossy bit stream (111). The lossy decoder also provides side information (115) that is used to control (105) the coefficients (118) of a prediction filter (106) that de-correlates the difference signal (104) between the PCM signal and the lossy decoder output. The de-correlated difference signal is lossless encoded (108), providing an extension bit stream (121). Instead of, or in addition to, de-correlating in the time domain, a de-correlation in the frequency domain using spectral whitening can be performed. The lossy encoded bit stream together with the lossless encoded extension bit stream form a lossless encoded bitstream. The invention facilitates enhancing a lossy perceptual audio encoding/decoding by an extension that enables mathematically exact reproduction of the original waveform, and provides additional data for reconstructing at decoder site an intermediate-quality audio signal. The lossless extension can be used to extend the widely used mp3 encoding/decoding to lossless encoding/decoding and superior quality mp3 encoding/decoding.

    摘要翻译: 在基于有损的无损编码一个PCM音频信号通过有损编码器(101)到一个有损解码器(102)通过。 有损编码器提供有损比特流(111)。 有损解码器,以便提供边信息(115)并用于控制(105)的预测滤波器的系数(118)(106)做去相关的PCM信号和有损解码器输出之间的差信号(104)。 解相关的差信号进行无损编码(108),提供对扩展比特流(121)。 代替或附加于解相关在时域,可以执行在使用频谱白化的频域中的去相关。 有损编码比特连同无损编码比特流扩展流形成无损编码的比特流。 本发明有利于增强有损感知音频编码/分机解码由没有启用原始波形的数学上精确再现,并在中间质量音频信号解码器处重建站点提供额外的数据。 无损扩展可用于扩展广泛使用的mp3编码/解码扩展为无损编码/解码和高质量mp3编码/解码。

    Method and device for transcoding audio signals
    3.
    发明公开
    Method and device for transcoding audio signals 审中-公开
    Verfahren und Vorrichtung zur Transkodierung von Tonsignalen

    公开(公告)号:EP1903559A1

    公开(公告)日:2008-03-26

    申请号:EP06120969.8

    申请日:2006-09-20

    IPC分类号: G10L19/14 G10L19/02

    摘要: The present invention provides method and device for transcoding between audio coding formats with different time-frequency analysis domains, as used for example by MPEG-AAC and mp3, particularly for facilitated and faster transcoding between such audio signals.
    A method for transcoding a framed audio signal from a first parameter domain (PD A ) into a second parameter domain (PD 3 ) comprises linearly transforming (T T ) two or more parameters of the first parameter domain (PD A ) to at least one parameter of the second parameter domain (PD B ), wherein the two or more parameters of the first parameter domain come from different frames of the audio signal in the first parameter domain. The linear transformation (T T ) can be described as a matrix and implemented as a look-up table.

    摘要翻译: 本发明提供了用于例如通过MPEG-AAC和mp3使用的不同时间 - 频率分析域的音频编码格式之间进行代码转换的方法和装置,特别是用于在这种音频信号之间促进和更快速的转码。 将成帧音频信号从第一参数域(PDA)转码成第二参数域(PD 3)的方法包括将第一参数域(PDA)的两个或多个参数线性变换(TT)至至少一个参数 的第二参数域(PD B),其中第一参数域的两个或多个参数来自第一参数域中的音频信号的不同帧。 线性变换(T T)可以被描述为矩阵并被实现为查找表。

    Method and apparatus for lossless encoding of a source signal, using a lossy encoded data stream and a lossless extension data stream
    4.
    发明公开
    Method and apparatus for lossless encoding of a source signal, using a lossy encoded data stream and a lossless extension data stream 审中-公开
    对源信号的无损编码,使用有损编码的数据流和无损扩展数据流的方法和装置。

    公开(公告)号:EP1883067A1

    公开(公告)日:2008-01-30

    申请号:EP06117720.0

    申请日:2006-07-24

    IPC分类号: G10L19/00 G10L19/14

    摘要: The invention is related to lossless encoding of a source signal (S PCM ), using a lossy encoded data stream and a lossless extension data stream which together form a lossless encoded data stream (S ENC ) for said source signal, whereby lossless audio compression means audio coding with bit-exact reproduction of the original PCM samples at decoder output. The lossy encoding/decoding may be an mp3 coding/decoding. The invention uses an integer MDCT and frequency domain decorre-lation (16) and time domain de-correlation (16) for the residual signal of the base-layer lossy audio codec. The exploitation of side information from the lossy base-layer codec allows for reduction of redundancies in the gross bit stream, thus improving the coding efficiency of the lossy based lossless codec.

    摘要翻译: 本发明涉及一种源信号(S PCM)进行无损编码,使用有损编码的数据流和无损扩展数据流一起形成所述源信号无损编码数据流(S ENC),由此无损音频压缩装置 音频编码与译码器输出的原始PCM样本的比特精确再现。 有损编码/解码可以是MP3编码/解码。 本发明使用整数MDCT域和频域decorre-特征研(16)和用于基本层有损音频编解码器的残差信号的时域解相关(16)的。 的边信息从有损基本层编解码器的开发允许总比特流中的冗余减少的,从而提高了基于有损的无损编解码器的编码效率。

    Method and apparatus for lossless encoding of a source signal using a lossy encoded data stream and a lossless extension data stream
    5.
    发明公开
    Method and apparatus for lossless encoding of a source signal using a lossy encoded data stream and a lossless extension data stream 审中-公开
    方法和装置,用于在源信号的无损编码,使用有损编码的数据流和无损扩展数据流

    公开(公告)号:EP1852848A1

    公开(公告)日:2007-11-07

    申请号:EP06113576.0

    申请日:2006-05-05

    IPC分类号: G10L19/00 G10L19/14

    CPC分类号: G10L19/24 G10L19/0017

    摘要: In lossy based lossless coding a PCM audio signal passes through a lossy encoder (41) to a lossy decoder (42). The lossy encoder provides a lossy bit stream. The difference signal (S Diff ) between the PCM signal and the lossy decoder output is lossless encoded (52), providing an extension bit stream. The invention facilitates enhancing a lossy perceptual audio encoding/decoding by an extension that enables mathematically exact reproduction of the original waveform using enhanced de-correlation, and provides additional data for reconstructing at decoder site an intermediate-quality audio signal. The lossless extension can be used to extend the widely used mp3 encoding/decoding to lossless encoding/decoding and superior quality mp3 encoding/de-coding.

    摘要翻译: 在基于有损的无损编码一个PCM音频信号通过有损编码器(41)到一个有损解码器(42)通过。 有损编码器提供有损比特流。 该PCM信号和有损解码器输出之间的差信号(S Diff)四个是无损编码(52),提供在扩展比特流。 本发明有利于增强有损感知音频编码/分机解码由并允许使用增强的去相关的原来的波形的数学上精确再现,并在中间质量音频信号解码器处重建站点提供额外的数据。 无损扩展可用于扩展广泛使用的mp3编码/解码扩展为无损编码/解码和高质量mp3编码/解码。

    Method and apparatus for re-encoding signals
    6.
    发明公开
    Method and apparatus for re-encoding signals 审中-公开
    Verfahren und Vorrichtung zur Wiederkodierung von Signalen

    公开(公告)号:EP1855271A1

    公开(公告)日:2007-11-14

    申请号:EP06113867.3

    申请日:2006-05-12

    IPC分类号: G10L19/14 G10L19/02

    摘要: At the time of encoding audio content, the finally required data rate for delivery to the customer may be unknown. A data format is disclosed that is optimized for serving as Intermediate Format for efficient and fast recoding, to obtain one or more standard complying lossy encoded data streams with flexible data rates. Encoding can be performed in two steps that are inter-coordinated for cooperating, but may be locally and/or temporally separate. Between the partial encoders encoding parameters and/or auxiliary data are transmitted in a separate parameter enhancement layer (524), which complements a lossy data stream (520) and can be used by the second encoder or transcoder for fast and computationally efficient implementation of the second encoding step. An additional lossless enhancement layer allows lossless reconstruction.

    摘要翻译: 在对音频内容进行编码时,传送给客户的最终所需的数据速率可能是未知的。 公开了针对用于高效和快速重新编码的中间格式进行优化的数据格式,以获得具有灵活数据速率的一个或多个标准符合有损编码数据流。 编码可以在两个步骤中执行,这两个步骤是相互协调的,用于协作,但可以在本地和/或时间上分离。 编码参数和/或辅助数据的部分编码器之间的传输是在单独的参数增强层(524)中发送的,该参数增强层(524)补充有损数据流(520)并且可被第二编码器或代码转换器用于快速和计算上有效地实现 第二编码步骤。 额外的无损增强层允许无损重建。