Audio signal processing, encoding, and decoding

• US 7,672,379 B2
• Filed: 10/04/2006
• Issued: 03/02/2010
• Est. Priority Date: 10/05/2005
• 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): Payne; David C
• Assistant Examiner(s): DSOUZA, JOSEPH FRANCIS A
• Application Number:
  US12/089,385
• Publication Number:
  US 20080260020A1
• Time in Patent Office: 1,245 Days
• Field of Search: 375/295, 386/112
• US Class Current: 375/242
• 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: 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

Apparatus and methods for processing signals are disclosed. A data structure for processing a signal includes a payload part having at least one of data coding information including pilot coding information per a frame and entropy coding information. The data structure includes a header part having main configuration information for the payload part. In the data structure, the main configuration information includes a first time information part having time information for entire frames and a first frequency information part having frequency information for the entire frames. The main configuration information further includes a first internal grouping information part including information for internal-grouping a group having a plurality of data per the frame.

Claims

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

receiving, by an audio coding apparatus, a first audio signal including a payload part and a header part that has main configuration information of the payload part;

extracting at least one of data coding information and entropy coding information from the payload part,

wherein the payload part has at least one frame comprising;

a first data part having at least one of the data coding information and the entropy coding information per a group, the data coding information indicating a data coding scheme, the data coding scheme including a pilot coding scheme; and

a frame information part having sub-configuration information for the first data part; and

generating a second audio signal using the extracted information,

wherein;

the pilot coding scheme is used to encode or decode data elements of a current group included in a current frame using a pilot reference value and one or more pilot difference values generated using the data elements and the pilot reference value,

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

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

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

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

2. The method of claim 1, wherein the main configuration information comprises:

a first time information part having time information for frames; and

a first frequency information part having frequency information for the frames.

3. The method of claim 2, wherein the main configuration information further comprises a first internal grouping information part having information per a frame, and wherein the information per the frame corresponds to information for internal-grouping of a group with data.

4. The method of claim 1, wherein the data coding scheme further includes a differential coding scheme or a PCM coding scheme.

5. The method of claim 1, wherein the sub-configuration information comprises a second time information part having time information for entire groups.

6. The method of claim 1, the sub-configuration information further comprising an external grouping information part including information for external grouping data.

7. The method of claim 1, the sub-configuration information further comprising a second internal grouping information part including information for internal-grouping the group of data.

8. 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 current group.

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

10. An audio coding apparatus for processing a signal using pilot based coding (PBC), the apparatus comprising:

a decoding part configured to;

receive a first audio signal including a payload part and a header part that has main configuration information of the payload part, and

extract at least one of data coding information and entropy coding information from the payload part,

wherein the payload part has at least one frame comprising;

a first data part having at least one of the data coding information and the entropy coding information per a group, the data coding information indicating a data coding scheme, the data coding scheme including a pilot coding scheme; and

a frame information part having sub-configuration information for the first data part; and

a reconstructing part configured to generate a second audio signal using the extracted information,

wherein;

the pilot coding scheme is used to encode or decode data elements of a current group included in a current frame using a pilot reference value and one or more pilot difference values generated using the data elements and the pilot reference value,

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

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

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

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

11. The apparatus of claim 10, wherein the main configuration information comprises:

a first time information part having time information for frames; and

a first frequency information part having frequency information for the frames.

12. The apparatus of claim 11, wherein the main configuration information further comprises a first internal grouping information part having information per a frame, and wherein the information per the frame corresponds to information for internal-grouping of a group with data.

13. The apparatus of claim 10, wherein the data coding scheme further includes a differential coding scheme or a PCM coding scheme.

14. The apparatus of claim 10, wherein the sub-configuration information comprises a second time information part having time information for entire groups.

15. The apparatus of claim 10, the sub-configuration information further comprising an external grouping information part including information for external grouping data.

16. The apparatus of claim 10, the sub-configuration information further comprising a second internal grouping information part including information for internal-grouping the group of data.

17. The apparatus of claim 10, wherein the pilot reference value represents and intermediate, average, or most frequently used value associated with the data elements of the current group.

18. A system for processing a signal using pilot based coding (PBC), the system comprising:

an audio coding apparatus configured to;

receive a first audio signal including a payload part and a header part that has main configuration information of the payload part;

extract at least one of data coding information and entropy coding information from the payload part,

wherein the payload part has at least one frame comprising;

a first data part having at least one of the data coding information and the entropy coding information per a group, the data coding information indicating a data coding scheme, the data coding scheme including a pilot coding scheme; and

a frame information part having sub-configuration information for the first data part; and

generate a second audio signal using the extracted information,

wherein;

the pilot coding scheme is used to encode or decode data elements of a current group included in a current frame using a pilot reference value and one or more pilot difference values generated using the data elements and the pilot reference value,

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

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

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

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

19. The system of claim 18, wherein the main configuration information comprises:

a first time information part having time information for frames; and

a first frequency information part having frequency information for the frames.

20. The system of claim 19, wherein the main configuration information further comprises a first internal grouping information part having information per a frame, and wherein the information per the frame corresponds to information for internal-grouping of a group with data.

21. The system of claim 18, wherein the data coding scheme further includes a differential coding scheme or a PCM coding scheme.