Method and apparatus for signal processing and encoding and decoding method, and apparatus therefor

• US 7,865,369 B2
• Filed: 10/09/2006
• Issued: 01/04/2011
• Est. Priority Date: 01/13/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Oh, Hyen O, Pang, Hee Suk, Lim, Jae Hyun, Kim, Dong Soo, Kim, Hyo Jin, Jung, Yang-Won
• Primary Examiner(s): Vo; Huyen X.
• Application Number:
  US12/089,368
• Publication Number:
  US 20080270145A1
• Time in Patent Office: 1,548 Days
• Field of Search: 704/229, 704/205, 704/500, 704/501, 704/502, 704/503, 704/504, 704/200, 704/201
• 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 19/20 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 group reference value corresponding to a plurality of data included in one group through grouping and a difference value corresponding to the group reference value and obtaining the data using the group reference value and the difference value.

Claims

1. A method of processing a signal using pilot based coding (PBC), the method comprising:

obtaining, by an audio coding apparatus, first frequency grouping information identifying a number of parameter bands within a frame, and second frequency grouping information identifying a group of data bands from the number of parameter bands;

obtaining, by the audio coding apparatus, a pilot reference value and one or more pilot difference values associated with the identified group of data bands; and

obtaining, by the audio coding apparatus, data elements of the identified group of data bands, using the pilot reference value and the pilot difference values,

wherein;

the pilot reference value is dependent on the data elements of the identified group of data bands, and is not dependent on data elements of an other frame,

a quantity of the pilot difference values is equal to a quantity of the data elements of the identified group of data bands,

the pilot reference value is a single value which applies to all of the data elements of the identified group of data bands, and

each pilot difference value corresponds to each data element of the identified group of data bands.

2. The method of claim 1, wherein the first frequency grouping information is obtained from a header information area and is applied to all frames within the signal.

3. The method of claim 1, wherein the second frequency grouping information is obtained from a frame information area and is applied to a corresponding frame.

4. The method of claim 1, further comprising reconstructing an audio signal using the obtained data elements.

5. An apparatus for processing a signal, comprising:

an audio coding apparatus configured to;

obtain first frequency grouping information identifying a number of parameter bands within a frame, and second frequency grouping information identifying a group of data bands from the number of parameter bands;

obtain a pilot reference value and one or more pilot difference values associated with the identified group of data bands; and

obtain data elements of the identified group of data bands, using the pilot reference value and the pilot difference values,

wherein;

the pilot reference value is dependent on the data elements of the identified group of data bands, and is not dependent on data elements of an other frame,

a quantity of the pilot difference values is equal to a quantity of the data elements of the identified group of data bands,

the pilot reference value is a single value which applies to all of the data elements of the identified group of data bands, and

each pilot difference value corresponds to each data element of the identified group of data bands.

6. The apparatus of claim 5, wherein the audio coding apparatus is further configured to:

decode the pilot reference value and the pilot difference values.

7. The apparatus of claim 5, wherein the audio coding apparatus is further configured to:

reconstruct an audio signal using the data elements of the identified group of data bands.

8. The apparatus of claim 5, wherein the audio coding apparatus is further configured to:

receive the first frequency grouping information from a header information area and apply the first frequency grouping information to all frames within the signal.

9. The apparatus of claim 5, wherein the audio coding apparatus is further configured to:

receive the second frequency grouping information from a frame information area and apply the second frequency grouping information to a corresponding frame.