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

• US 20080275712A1
• Filed: 10/04/2006
• Published: 11/06/2008
• 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, Jung, Yang Won, Kim, Dong Soo, Kim, Hyo Jin
• Granted Patent: US 7,643,561 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 pilot reference value corresponding to a plurality of gains and a pilot difference value corresponding to the pilot reference value; and obtaining the gain using the pilot reference value and the pilot difference value.

Claims

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

Obtaining from the signal a pilot reference value corresponding to a plurality of gains and a pilot difference value corresponding to the pilot reference value; and

obtaining at least one gain from the plurality of gains using the pilot reference value and the pilot difference value.

2. The method of claim 1, further comprising the step of decoding at least one of the pilot difference value and the pilot reference value.

3. The method of claim 1, further comprising the step of reconstructing an audio signal using the obtained gain.

4. The method of claim 1, wherein the pilot reference value comprises an average of the plurality of gains or an approximate value of the average of the plurality of gains.

5. The method of claim 1, wherein the pilot reference value comprises an intermediate value of the plurality of gains.

6. The method of claim 1, wherein the pilot reference value comprises a most frequently used value of the plurality of gains.

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

8. The method of claim 1, wherein the pilot reference value comprises one value extracted from a table.

9. The method of claim 1, further comprising the step of selecting the gain having highest encoding efficiency as a final pilot reference value after the pilot reference value has been set to each of a plurality of gains.

10. An apparatus for processing a signal, comprising:

a value obtaining part configured for obtaining from the signal a pilot reference value corresponding to a plurality of gains and a pilot difference value corresponding to the pilot reference value; and

a gain obtaining part configured for obtaining the gain using the pilot reference value and the pilot difference value.

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

generating a pilot difference value using a pilot reference value corresponding to a plurality of gains and the gains, where in the pilot reference value is obtained from the signal; and

transferring the generated pilot difference value.

12. An apparatus for processing a signal, comprising:

a value calculating part configured for generating a pilot difference value using a pilot reference value corresponding to a plurality of gains and the gains, wherein the pilot reference value is obtained from the signal; and

an outputting part transferring the generated pilot difference value.