Signal processing using pilot based coding

• US 7,751,485 B2
• Filed: 10/09/2006
• Issued: 07/06/2010
• 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:
  US12/089,370
• Publication Number:
  US 20080228502A1
• Time in Patent Office: 1,366 Days
• Field of Search: None
• US Class Current: 375/242
• CPC Class Codes: G10L 19/00 Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis in musical instruments G10H
• 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

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 first grouping and external grouping for the first 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, time grouping information specifying a quantity of timeslots within a current frame and identifying a group of the timeslots included in the current frame;

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

obtaining data elements of the identified group of timeslots, 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 timeslots, 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 timeslots,

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

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

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

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

4. The method of claim 1, wherein the data elements are obtained using pilot based coding (PBC).

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

6. The method of claim 1, further comprising entropy-decoding the pilot reference value or the pilot difference values.

7. The method of claim 1, further comprising re-arranging the group of time slots within the current frame.

8. The method of claim 1, wherein the group of timeslots represents a timeslot pair or a timeslot triple.

9. The method of claim 1, wherein the group of timeslots comprises a single timeslot.

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

an obtaining part configured to;

obtain time grouping information specifying a quantity of timeslots within a current frame and identifying a group of the times lots included in the current frame;

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

obtain data elements 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 timeslots, 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 timeslots,

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

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

11. The apparatus of claim 10, wherein the pilot reference value represents an intermediate, average, or most frequently used value associated with the data elements of the identified group of timeslots.

12. The apparatus of claim 10, wherein the data elements are obtained using pilot based coding (PBC).

13. The apparatus of claim 10, further comprising a reconstructing part configured to reconstruct an audio signal using the data elements.

14. The apparatus of claim 10, further comprising an entropy-decoding part configured to entropy-decode the pilot reference value or the pilot difference values.

15. The apparatus of claim 10, wherein the obtaining part is further configured to re-arrange the group of timeslots within the current frame.

16. The apparatus of claim 10, wherein the group of timeslots represents a timeslot pair or a timeslot triple.

17. The apparatus of claim 10, wherein the group of timeslots comprises a single timeslot.

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

an audio coding apparatus configured to;

obtain time grouping information specifying a quantity of timeslots within a current frame and identifying a group of the times lots included in the current frame;

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

obtain data elements using the pilot reference value and the pilot difference values,

wherein;

the pilot reference value is dependent on each of the data elements of the identified group of timeslots, 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 timeslots;

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

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

19. The system of claim 18, wherein the pilot reference value represents an intermediate, average, or most frequently used value associated with the data elements of the identified group of timeslots.

20. The system of claim 18, wherein the data elements are obtained using pilot based coding (PBC).