Method of processing a signal and apparatus for processing a signal

• US 7,813,380 B2
• Filed: 10/04/2006
• Issued: 10/12/2010
• Est. Priority Date: 10/05/2005
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Pang, Hee Suk, Lim, Jae Hyun, Jung, Yang Won, Kim, Dong Soo, Oh, Hyen O
• Primary Examiner(s): Hsu; Alpus H
• Assistant Examiner(s): COSTIN, JEREMY M
• Application Number:
  US12/083,059
• Publication Number:
  US 20090225782A1
• Time in Patent Office: 1,469 Days
• Field of Search: 370/491, 370/535, 341/51, 341/56, 375/141, 375/147, 348/390.1, 348/423.1
• US Class Current: 370/491
• 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

A method and apparatus for signal processing which enable data compression and recovery with high transmission efficiency are disclosed. Data coding and entropy coding are performed with correlation and grouping is used to increase coding efficiency. A method for signal processing, the method indues decapsulating the signal received over an Internet protocol network, obtaining a group reference value corresponding to a plurality of data included in one group through grouping and a difference value corresponding the group reference value from the decapsulated signal and obtaining the data using the group reference value and the difference value.

Claims

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

receiving, by a manager, a signal including a video stream and an audio stream from an Internet,

demultiplexing, by a demultiplexer, the signal into the video stream and the audio stream, the audio stream including audio data;

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

decoding the audio data through extracting a pilot reference value and pilot difference values from the identified group of data bands and obtaining data elements of the group of data bands by adding the pilot reference value to the pilot difference values respectively,

wherein the pilot reference value is decided with reference to the data elements of the group of data bands,

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

the pilot difference values of the group of data bands are generated by subtracting the pilot reference value of the group of data bands from the data elements of the group of data bands respectively, and

a number of the pilot difference values of the group of data bands is equal to a number of the data elements of the group of data bands.

2. The method of claim 1, wherein the first frequency grouping information is obtained from a header information area.

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 audio data as parameters.

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

a manager receiving a signal including a video stream and an audio stream from an Internet;

a demultiplexer demultiplexing the signal into the video stream and the audio stream including audio data; and

an audio decoder obtaining first frequency grouping information identifying a number of parameter bands within a frame of the audio data and second frequency grouping information identifying a group of data bands from the number of parameter bands and decoding the audio data through extracting a pilot reference value and pilot difference values from the identified group of data bands and obtaining data elements of the group of data bands by adding the pilot reference value to the pilot difference values respectively,

wherein the pilot reference value is decided with reference to the data elements of the group of data bands,

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

the pilot difference values of the group of data bands are generated by subtracting the pilot reference value of the group of data bands from the data elements of the group of data bands respectively, and

a number of the pilot difference values of the group of data bands is equal to a number of the data elements of the group of data bands.

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

encoding, by an audio encoder, audio data by generating a pilot reference value of a group in the audio data and generating pilot difference values by subtracting the pilot reference value from data elements in the audio data and by generating first frequency grouping information identifying a number of parameter bands within a frame of the audio data, and second frequency grouping information identifying a group of data bands from the number of parameter bands;

multiplexing, by a multiplexer, an video stream and an audio stream into a signal, the audio stream including the encoded audio data; and

transmitting, by a transmitting unit, the signal through an Internet,

wherein the pilot reference value is decided with reference to the data elements of the group of data bands,

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

the pilot difference values of the group of data bands are generated by subtracting the pilot reference value of the group of data bands from the data elements of the group of data bands respectively, and

a number of the pilot difference values of the group of data bands is equal to a number of the data elements of the group of data bands.

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

an audio encoder encoding audio data by generating a pilot reference value of a group in the audio data and generating pilot difference values by subtracting the pilot reference value from data elements in the audio data and by generating first frequency grouping information identifying a number of parameter bands within a frame of the audio data, and second frequency grouping information identifying a group of data bands from the number of parameter bands;

a multiplexer multiplexing an video stream and an audio stream into a signal, the audio stream including the encoded audio data; and

transmitting unit transmitting the signal through an Internet,

wherein the pilot reference value is decided with reference to the data elements of the group of data bands,

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

the pilot difference values of the group of data bands are generated by subtracting the pilot reference value of the group of data bands from the data elements of the group of data bands respectively, and

a number of the pilot difference values of the group of data bands is equal to a number of the data elements of the group of data bands.

8. The transmitter of claim 7, wherein the manager transfers the group reference value and the difference value.