Abstract:
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 (110) 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 (130) to encode the input signal according to a selection of the module selection unit (110) and to generate a speech bitstream; an audio encoding unit (140) to encode the input signal according to the selection of the module selection unit (110) and to generate an audio bitstream; and a bitstream generation unit (150) to generate an output bitstream from the speech encoding unit (130) or the audio encoding unit (140) according to the selection of the module selection unit (110).
Abstract:
A module (100) capable of appropriately selecting a linear predictive coding (LPC)-based (103) or a code excitation linear prediction (CELP)-based speech or audio encoder and a transform-based (104) audio encoder according to a feature of an input signal is a module (100) that performs as a bridge for overcoming a performance barrier between a conventional LPC-based encoder (103) and an audio encoder. Also, an integral audio encoder that provides consistent audio quality regardless of a type of the input audio signal can be designed based on the module.
Abstract:
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.
Abstract:
Provided is an encoding apparatus for integrally encoding and decoding a speech signal and a audio signal, and may include: an input signal analyzer to analyze a characteristic of an input signal; a stereo encoder to down mix the input signal to a mono signal when the input signal is a stereo signal, and to extract stereo sound image information; a frequency band expander to expand a frequency band of the input signal; a sampling rate converter to convert a sampling rate; a speech signal encoder to encode the input signal using a speech encoding module when the input signal is a speech characteristics signal; a audio signal encoder to encode the input signal using a audio encoding module when the input signal is a audio characteristic signal; and a bitstream generator to generate a bitstream.