Audio signal processing using pilot based coding

• US 7,752,053 B2
• Filed: 10/04/2006
• Issued: 07/06/2010
• Est. Priority Date: 01/13/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Pang, Hee Suk, Lim, Jae Hyun, Kim, Dong Soo, Kim, Hyo Jin, Jung, Yang-Won, Oh, Hyen O
• Primary Examiner(s): Opsasnick; Michael N
• Application Number:
  US12/089,383
• Publication Number:
  US 20080270147A1
• Time in Patent Office: 1,371 Days
• Field of Search: 704/206, 704500-504
• US Class Current: 704/504
• 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 data grouping and internal grouping for the data 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 for processing a signal, the method comprising:

obtaining, by a data coding apparatus, entropy decoded data representing two or more data elements;

obtaining data grouping information indicating that the two or more data elements are bound in a frequency direction or a time direction;

obtaining time grouping information and frequency grouping information for identifying a group of data elements including the two or more data elements;

obtaining a pilot reference value and one or more pilot difference values, associated with the identified group of data elements; and

obtaining data elements of the identified group 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, and is not dependent on data elements of an other group,

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

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

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

2. The method of claim 1, wherein the two or more data elements are bound in the frequency direction or the time direction based upon an audio encoding device determining that the frequency direction or the time direction is a most efficient entropy coding scheme, respectively.

3. The method of claim 1, wherein the pilot reference value represents and intermediate, average, or most frequently used value associated with the data elements of the identified group.

4. The method of claim 1, wherein the audio coding apparatus comprises a processor.

5. The method of claim 1, wherein the identified group of data elements includes other data elements in addition to the two or more data elements.

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

7. An audio coding apparatus for processing a signal, the apparatus comprising:

an obtaining part configured to;

obtain entropy decoded data representing two or more data elements,

obtain data grouping information indicating that the two or more data elements are bound in a frequency direction or a time direction,

obtain time grouping information and frequency grouping information for identifying a group of data elements including the two or more data elements,

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

obtain data elements of the identified group 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, and is not dependent on data elements of an other group,

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

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

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

8. The apparatus of claim 7, wherein the two or more data elements are bound in the frequency direction or the time direction based upon an audio encoding device determining that the frequency direction or the time direction is a most efficient entropy coding scheme, respectively.

9. The apparatus of claim 7, wherein the pilot reference value represents and intermediate, average, or most frequently used value associated with the data elements of the identified group.

10. A system for processing a signal, the system comprising:

an audio coding apparatus configured to;

obtain entropy decoded data representing two or more data elements,

obtain data grouping information indicating that the two or more data elements are bound in a frequency direction or a time direction,

obtain time grouping information and frequency grouping information for identifying a group of data elements including the two or more data elements,

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

obtain data elements of the identified group 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, and is not dependent on data elements of an other group,

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

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

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