Methods for encoding a DSD signal input and to generate a signal of exit of DSD, encoder and decoder for audio, audio encoded signal device, and storage medium.

摘要

Methods for encoding a DSD signal input and to generate a signal output of DDS, encoder and decoder for audio device, audio signal, encoded, and storage medium. A coding scheme of audio PCM signal allowing for expansion of DSD signal without loss for next generation optical disc formats.The method of coding of an input signal on sampleamento DSD includes a PCM signal corresponding to the rate of sampleamento of DSD. Then, a set of parameters of mesh filter to a mesh of conformation of noise of a modulator Sigma - down is generated using a random starting condition of the modulator Sigma - throw or including synchronization parameters.This will allow a decoder regenerated signal almost perfect, but it still needs a correction signal to be able to regenerate identically in bit input signal of DDS.Therefore, a correction signal is generated based on a difference between a modulated version of Sigma - throw the PCM signal on sampleado and DSD signal input, where the version modulated Sigma - throw of the PCM signal on sampleado is obtained using the set of parameters of the micro filter.The correction signal may be adapted to be applied to the PCM signal of low bit rate, the PCM signal on sampleado or the flow of bit output. Finally, a stream of bit of expansion is generated, where a Codified version of the set of parameters of the micro filter and a Codified version of the correction signal are included.The decoder can reproduce the original DSD signal on the basis of the PCM signal already available and flow of bit of expansion is described. Then, the coding scheme enables superior quality audio with minimal storage overhead, as the PCM signal already available is used in combination with a stream of bit of expansion.Since only a flow of additional data is required to be stored in a disk, for example, as part of an MPEG stream, DSD functionality is added to existing systems without causing compatibility problems.