Audio bit stream data structure layout of lossless extension encoded data bit stream data and the signal of the lossy coded signal

摘要

Reducing the data rate by using the redundancy of the original audio signal is not only possible, lossless compression algorithms, not possible to reduce the non-suitability identified by psychoacoustics. Applying a conversion filter or for decorrelation, then lossless audio coding scheme encodes the converted signal. Coded bit stream includes a lossless representation of the transformed signal parameters, and filter or conversion. However, the lossless coding of the lossy base, the amount of additional information, multiple of the data amount of the base layer only, more than the amount of data of the base layer. Therefore, the base layer data stream, for example, further data is not necessarily that as auxiliary data, to packing completely is possible. Base layer containing the lossy coding information, and data streams of two enhancement to reconstruct the original input signal of the reversible mathematically least arising from the combination of a lossless coding extension lossy encoding format - is the data stream. In addition, I can be considered intermediate layer quality of some. However, the data streams described above are not independent of each other. It is possible that all higher layer depends on the lower layer, only in combination with the lower layer described above, is successfully decoded. In accordance with the present invention, a special combination of one-time header information with repeated header information in a block structure is used, the type of the combination depends on the type of application. Assignment information data identify the portions or layers of different lossy format belonging to one input signal. With the synchronized data, to synthesize the intermediate output signal or the output signal of the reversible single layer or a partial or separate data streams. Configuration described above is used in a streaming format and file format.