Method and Apparatus For Signal Processing and Encoding and Decoding Method, and Apparatus Therefor

• US 20080262852A1
• Filed: 10/09/2006
• Published: 10/23/2008
• Est. Priority Date: 10/05/2005
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Oh, Hyeon O, Pang, Hee Suk, Lim, Jae Hyun, Kim, Dong Soo, Kim, Hyo Jin, Jung, Yang-Won
• Granted Patent: US 7,774,199 B2
• Time in Patent Office: Days
• US Class Current: 704/500
• CPC Class Codes: G10L 19/0017 Lossless audio signal coding; Perfect reconstruction of coded audio signal by transmission of coding error G10L19/24 takes precedence
• 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 19/04 using predictive techniques
• CPC Class Codes: G10L 19/167 Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes
• CPC Class Codes: G10L 19/18 Vocoders using multiple modes
• 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: H03M 7/30 Compression speech analysis-synthesis for redundancy reduction G10L19/00; for image communication H04N; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
• CPC Class Codes: H03M 7/40 Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
• CPC Class Codes: H03M 7/42 using table look-up for the coding or decoding process, e.g. using read-only memory H03M7/4006 takes precedence
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• CPC Class Codes: H04S 1/007 in which the audio signals are in digital form data reduction aspects thereof based on psychoacoustics G10L19/02

Abstract

An apparatus for processing a signal and method thereof are disclosed. Data coding and entropy coding are performed with interconnection, and grouping is used to enhance coding efficiency. The present invention includes the steps of obtaining a difference value and index information and entropy-decoding the index information and identifying an entropy table corresponding to the entropy-decoded index information and entropy-decoding the difference value using the identified entropy table and obtaining data using a reference value corresponding to a plurality of data and the decoded difference value.

Claims

1. A method of processing a signal, comprising the steps of:

obtaining a difference value and index information from the signal;

entropy-decoding the index information;

identifying an entropy table corresponding to the entropy-decoded index information;

entropy-decoding the difference value using the identified entropy table; and

obtaining data using a reference value corresponding to data and the decoded difference value.

2. The method of claim 1, wherein the reference value comprises a pilot reference value.

3. The method of claim 1, wherein the reference value comprises a difference reference value.

4. The method of claim 1, wherein the index information is entropy-decoded using an index dedicated entropy table.

5. The method of claim 1, wherein the entropy table is classified according to a type of the data.

6. The method of claim 1, wherein the data is a parameter and wherein the method further comprises the step of reconstructing an audio signal using the parameter.

7. The method of claim 1, wherein in the step of entropy-decoding the difference value, a two-dimensional entropy decoding is performed on the difference value using the entropy table.

8. The method of claim 1, further comprising the steps of:

obtaining the reference value; and

entropy-decoding the reference value using the entropy table corresponding to the reference value.

9. An apparatus for processing a signal, comprising:

an inputting part configurable for obtaining a difference value and index information from the signal;

an index decoding part configurable for entropy-decoding the index information;

a table identifying part configurable for identifying an entropy table corresponding to the entropy-decoded index information;

a data decoding part configurable for entropy-decoding the difference value using the identified entropy table; and

a data obtaining part configurable for obtaining data using a reference value corresponding to data and the decoded difference value.

10. A method of processing a signal, comprising the steps of:

generating a difference value using a reference value corresponding to data and the data;

entropy-encoding the difference value using an entropy table;

generating index information to identify the entropy table;

entropy-encoding the index information; and

transferring the entropy-encoded index information and the difference value.

11. An apparatus for processing a signal, comprising:

a value generating part configurable for generating a difference value using a reference value corresponding to a plurality of data and the data, wherein the reference value is obtained from the signal;

a value encoding part entropy-encoding the difference value using an entropy table;

an information generating part generating index information to identify the entropy table; and

an index encoding part entropy-encoding the index information; and

an information outputting part transferring the entropy-encoded index information and the difference value.