APPARATUS AND METHOD FOR ENCODING AND DECODING OF INTEGRATED SPEECH AND AUDIO

• US 20170345435A1
• Filed: 06/09/2017
• Published: 11/30/2017
• Est. Priority Date: 07/14/2008
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute, Kwangwoon University Industry
• Inventors: LEE, Tae Jin, BAEK, Seung-Kwon, KIM, Min Je, JANG, Dae Young, SEO, Jeongil, KANG, Kyeongok, HONG, Jin-Woo, PARK, Hochong, PARK, Young-cheol
• Granted Patent: US 10,121,482 B2
• Time in Patent Office: Days
• CPC Class Codes: G10L 19/008 Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
• CPC Class Codes: G10L 19/02 using spectral analysis, e.g. transform vocoders or subband vocoders
• CPC Class Codes: G10L 19/12 the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
• CPC Class Codes: G10L 19/20 using sound class specific coding, hybrid encoders or object based coding
• CPC Class Codes: G10L 19/22 Mode decision, i.e. based on audio signal content versus external parameters
• CPC Class Codes: G11C 2207/16 Solid state audio deprecated, only for historical reasons, G06F3/16, G11B

Abstract

Provided are an apparatus and a method for integrally encoding and decoding a speech signal and a audio signal. The encoding apparatus may include: an input signal analyzer to analyze a characteristic of an input signal; a first conversion encoder to convert the input signal to a frequency domain signal, and to encode the input signal when the input signal is a audio characteristic signal; a Linear Predictive Coding (LPC) encoder to perform LPC encoding of the input signal when the input signal is a speech characteristic signal; and a bitstream generator to generate a bitstream using an output signal of the first conversion encoder and an output signal of the LPC encoder.

Claims

1. A encoding method performed by one or more processor, the method comprising:

analyzing a characteristic of an input signal whether the input signal is an audio characteristic signal or a speech characteristic signal;

encoding a core band of the input signal based on a time-domain encoding module, when the input signal is the speech characteristic signal, or

encoding a core band of the input signal based on a transform encoding module, when the input signal is the audio characteristic signal,

wherein the input signal is processed by switching either the time-domain encoding module or transform encoding module based on the characteristic of the input signal,

wherein the core band is a frequency band of the input signal which is not to be expanded.

2. The method of claim 1, wherein the expanding comprising:

encoding a result of Spectral Band Replication (SBR) related to the input signal.

3. The method of claim 1, wherein the time-domain encoding module encodes the core band of the input signal based on Linear Predictive Coding (LPC) scheme.

4. The method of claim 1, wherein the transform encoding module encodes the core band of the input signal based on a Modified Discrete Cosine Transform (MDCT) scheme.

5. A decoding method performed by one or more processor, the method comprising:

determining a characteristic of an input signal whether an input signal is an audio characteristic signal or a speech characteristic signal

decoding a core band of the input signal based on a time-domain decoding module, when the input signal is the speech characteristic signal, or

decoding a core band of the input signal based on a transform decoding module, when the input signal is the audio characteristic signal,

wherein the input signal is processed by switching either the time-domain decoding module or transform decoding module based on the characteristic of the input signal,

wherein the core band is a frequency band of the input signal which is not to be expanded.

6. The method of claim 5, wherein the time-domain decoding module decodes the core band of the input signal based on Linear Predictive Coding (LPC) scheme.

7. The method of claim 5, wherein the transform decoding module decodes the core band of the input signal based on a Modified Discrete Cosine Transform (MDCT) scheme.

8. A decoding apparatus comprising:

one or more processor;

wherein the processor configured to;

determine a characteristic of an input signal whether an input signal is an audio characteristic signal or a speech characteristic signal

decode a core band of the input signal based on a time-domain decoding module, when the input signal is the speech characteristic signal, or

decode a core band of the input signal based on a transform decoding module, when the input signal is the audio characteristic signal,

wherein the input signal is processed by switching either the time-domain decoding module or transform decoding module based on the characteristic of the input signal,

wherein the core band is a frequency band of the input signal which is not to be expanded.