Apparatus for encoding and decoding of integrated speech and audio

摘要

Provided is an apparatus for integrally encoding and decoding a speech signal and an audio signal. An encoding apparatus for integrally encoding a speech signal and an audio signal, may include: a module selection unit to analyze a characteristic of an input signal and to select a first encoding module for encoding a first frame of the input signal; a speech encoding unit to encode the input signal according to a selection of the module selection unit and to generate a speech bitstream; an audio encoding unit to encode the input signal according to the selection of the module selection unit and to generate an audio bitstream; and a bitstream generation unit to generate an output bitstream from the speech encoding unit or the audio encoding unit according to the selection of the module selection unit.

主权项

1. An encoding apparatus for integrally encoding a speech signal and an audio signal, the encoding apparatus comprising:
a module selection unit to analyze a characteristic of an input signal and to select a first encoding module for encoding a current frame of the input signal; a speech encoding unit to encode the input signal according to a selection of the module selection unit and to generate a speech bitstream; an audio encoding unit to encode the input signal according to the selection of the module selection unit and to generate an audio bitstream; a module buffer to transmit information of a second encoding module corresponding to a previous frame of the current frame to the speech encoding unit and the audio encoding unit; and a bitstream generation unit to generate an output bitstream from the speech encoding unit or the audio encoding unit according to the selection of the module selection unit, wherein, when an overlap operation between the previous frame and the current frame occurs, the speech encoding unit encodes a half sample of the previous frame having a speech characteristic as additional information to decode a current frame having an audio characteristic according to MDCT(Modified Discrete Cosine Transform) at a decoding apparatus, wherein the bitstream generation unit generates the output bitstream including module information for the current frame selected by the module selection unit, the speech bitstream generated from the speech encoding unit and the audio bitstream generated from the audio encoding unit.