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

• US 20080262851A1
• Filed: 10/04/2006
• Published: 10/23/2008
• 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 7,660,358 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 number of data corresponding to a pilot reference value and if a number of data bands meets a predetermined condition, obtaining the pilot reference value and a pilot difference value corresponding to the pilot reference value and obtaining the data using the pilot reference value and the pilot difference value. The number of the data is obtained using the number of the data bands in which the data are included. The present invention includes the steps of deciding one of a plurality of data coding schemes using a number of data and decoding the data according to the decided data coding scheme, wherein a plurality of the data coding schemes include a pilot coding scheme at least.

Claims

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

obtaining from the signal a number of data corresponding to a pilot reference value;

if a number of data bands meets a predetermined condition, obtaining the pilot reference value and a pilot difference value corresponding to the pilot reference value and obtaining the data using the pilot reference value and the pilot difference value.

2. The method of claim 1, wherein the number of data is obtained using the number of the data bands in which the data are included.

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

deciding one of a plurality of data coding schemes using a number of data; and

decoding the data according to the decided data coding scheme,

wherein a plurality of the data coding schemes include at least a pilot coding scheme.

4. The method of claim 3, wherein if the number of data meets a predetermined condition, the data coding scheme is decided as the pilot coding scheme.

5. The method of claim 4, the data decoding step comprising the steps of:

obtaining a pilot reference value corresponding to a plurality of data and a pilot difference value corresponding to the pilot reference value; and

obtaining the data using the pilot reference value and the pilot difference value.

6. The method of claim 3, wherein the data are parameters and wherein the method further comprises the step of recovering an audio signal using the parameters.

7. The method of claim 5, further comprising the steps of:

receiving identification information corresponding to the number of parameters; and

generating the number of parameters using the received identification information.

8. The method of claim 3, further comprising the step of by considering the number of data, extracting identification information indicating a plurality of the data coding schemes hierarchically.

9. The method of claim 8, the identification information extracting step comprising the steps of:

extracting a first identification information indicating a first data coding scheme; and

extracting a second identification information indicating a second data coding scheme using the first identification information and the number of data.

10. The method of claim 8, wherein the first identification information indicates whether it is a differential (DIFF) coding scheme and wherein the second identification information indicates whether it is a pilot coding scheme or a pulse code modulation (PCM) grouping scheme.

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

if a number of data meets a predetermined condition, generating a pilot difference value using a pilot reference value corresponding to the data and the data; and

transferring the generated pilot difference value.

12. The method of claim 11, further comprising the step of transferring the pilot reference value.

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

deciding one of a plurality of data coding schemes according to a number of data; and

encoding the data according to the decided data coding scheme,

wherein a plurality of the data coding schemes include at least a pilot coding scheme.

14. The method of claim 13, wherein if the number of data meets a predetermined condition, the data coding scheme is decided as the pilot coding scheme.

15. An apparatus for processing a signal, comprising:

a number obtaining part configured for obtaining a number of data corresponding to a pilot reference value, wherein the number of data is obtained from the signal;

a value obtaining part configured for obtaining the pilot reference value and a pilot difference value corresponding to the pilot reference value if the number of data meets a predetermined condition, wherein the pilot reference value and the pilot difference value are obtained from the signal; and

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

16. An apparatus for processing a signal, comprising:

a scheme deciding part configured for deciding one of a plurality of data coding schemes according to a number of a data, wherein the number of data is obtained from the signal; and

a decoding part configured for decoding the data according to the decided data coding scheme,

wherein a plurality of the data coding schemes include at least a pilot coding scheme.

17. An apparatus for processing a signal, comprising:

a value generating part configured for generating a pilot difference value using a pilot reference value corresponding to a plurality of data and the data if a number of the data meets a predetermined condition, wherein the pilot difference value is obtained from the signal; and

an output part configured for transferring the generated pilot difference value.

18. An apparatus for processing a signal, comprising:

a scheme deciding part configured for deciding one of a plurality of data coding schemes according to a number of data; and

an encoding part configured for encoding the data according to the decided data coding scheme,

wherein a plurality of the data coding schemes include at least a pilot coding scheme.