公开(公告)号：US20070076689A1

公开(公告)日：2007-04-05

申请号：US10576162

申请日：2004-10-11

申请人： Arnoldus Oomen ,  Fransiscus De Bont

发明人： Arnoldus Oomen ,  Fransiscus De Bont

IPC分类号： H04L12/66

CPC分类号： G11B27/105 ,  G11B27/3027

摘要： A data stream contains segments with reproducible signal data that has been encoded with a variable length encoding scheme. Each segment also contains first and second information about the length of the signal data in the segment, stored at predetermined relative positions with respect to the start and end of the signal data in the particular segment. During replay access locations are computed for accessing a next succeeding or preceding segment adjacent to a particular segment when a forward and backward direction of replay are selected respectively. The access location is computed from the first information from the particular segment or the second information from the adjacent segment that precedes the particular segment, dependent on whether the forward or backward direction is selected respectively.

摘要翻译： 数据流包含已经用可变长度编码方案编码的具有可再现信号数据的段。 每个段还包含关于段中的信号数据的长度的第一和第二信息，其存储在相对于特定段中的信号数据的开始和结束的预定相对位置处。 在重放期间，当分别选择重放的前进和后退方向时，计算访问位置以访问与特定段相邻的下一个后续或前一段。 取决于是否分别选择正向或反向方向，从特定段的第一信息或来自特定段之前的相邻段的第二信息计算接入位置。

公开(公告)号：US20070067162A1

公开(公告)日：2007-03-22

申请号：US10577106

申请日：2004-10-28

申请人： Lars Villemoes ,  Per Ekstrand ,  Heiko Purnhagen ,  Erik Schuijers ,  Fransiscus de Bont

发明人： Lars Villemoes ,  Per Ekstrand ,  Heiko Purnhagen ,  Erik Schuijers ,  Fransiscus de Bont

IPC分类号： G10L11/04

CPC分类号： G10L19/008 ,  G10L21/038

摘要： Encoding an audio signal is provided wherein the audio signal includes a first audio channel and a second audio channel, the encoding comprising subband filtering each of the first audio channel and the second audio channel in a complex modulated filterbank to provide a first plurality of subband signals for the first audio channel and a second plurality of subband signals for the second audio channel, downsampling each of the subband signals to provide a first plurality of downsampled subband signals and a second plurality of downsampled subband signals, further subband filtering at least one of the downsampled subband signals in a further filterbank in order to provide a plurality of sub-subband signals, deriving spatial parameters from the sub-subband signals and from those downsampled subband signals that are not further subband filtered, and deriving a single channel audio signal comprising derived subband signals derived from the first plurality of downsampled subband signals and the second plurality of downsampled subband signals. Further, decoding is provided wherein an encoded audio signal comprising an encoded single channel audio signal and a set of spatial parameters is decoded by decoding the encoded single channel audio channel to obtain a plurality of downsampled subband signals, further subband filtering at least one of the downsampled subband signals in a further filterbank in order to provide a plurality of sub-subband signals, and deriving two audio channels from the spatial parameters, the sub-subband signals and those downsampled subband signals that are not further subband filtered.

摘要翻译： 提供对音频信号进行编码，其中音频信号包括第一音频通道和第二音频通道，该编码包括在复调制滤波器组中对第一音频通道和第二音频通道中的每一个进行子带滤波，以提供第一多个子带信号 对于第一音频通道和用于第二音频通道的第二多个子带信号，对每个子带信号进行下采样以提供第一多个下采样子带信号和第二多个下采样子带信号，进一步子带滤波至少一个 在另一个滤波器组中进行下采样的子带信号，以便提供多个子子带信号，从子子带信号和未进一步子带滤波的那些下采样子带信号导出空间参数，以及导出包括导出的 从第一多个下采样子带信号导出的子带信号和 第二多个下采样子带信号。 此外，提供了解码，其中包括编码的单声道音频信号和一组空间参数的编码音频信号通过对编码的单声道音频声道进行解码以获得多个下采样的子带信号而被解码，进一步的子带滤波至少一个 在另一滤波器组中进行下采样的子带信号，以便提供多个子子带信号，以及从空间参数，子子带信号和未进一步子带滤波的那些下采样子带信号导出两个音频信道。

公开(公告)号：US20070250308A1

公开(公告)日：2007-10-25

申请号：US11573919

申请日：2005-08-08

申请人： Jun Lee ,  Werner Oomen ,  Fransiscus De Bont

发明人： Jun Lee ,  Werner Oomen ,  Fransiscus De Bont

IPC分类号： G10L19/14

CPC分类号： G10L19/173

摘要： A method and device for transcoding a first audio or video signal represented in one compression format to a second audio or video signal represented in another compression format. The transcoding is performed by direct mapping symbols from the first signal format to symbols of the second signal format. The transcoding can be performed between different formats or between the same format but with different bitrates. Such formats may be MP3 or aac.

摘要翻译： 一种用于将以一种压缩格式表示的第一音频或视频信号进行代码转换为以另一压缩格式表示的第二音频或视频信号的方法和装置。 通过将符号从第一信号格式直接映射到第二信号格式的符号来执行代码转换。 代码转换可以在不同格式之间进行，也可以在相同的格式之间进行，但是具有不同的比特率。 这样的格式可以是MP3或者aac。