Method of processing a signal and apparatus for processing a signal

• US 8,755,442 B2
• Filed: 10/04/2006
• Issued: 06/17/2014
• 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: Oh, Hyen O, Pang, Hee Suk, Kim, Dong Soo, Lim, Jae Hyun, Jung, Yang Won
• Primary Examiner(s): Dastouri, Mehrdad
• Assistant Examiner(s): RAHAMAN, MOHAMMED S
• Application Number:
  US12/083,082
• Publication Number:
  US 20090052519A1
• Time in Patent Office: 2,813 Days
• Field of Search: 37524001-24029, 370/389, 704/211, 382/232
• US Class Current: 375/240.23
• 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 according to this invention, the method includes decapsulating the signal received over an Internet protocol network, obtaining data coding identification information from the de-capsulated signal and data-decoding data according to a data coding scheme indicated by the data coding identification information, wherein the data coding scheme includes at least a pilot coding scheme, the pilot coding scheme decodes the data using a pilot reference value corresponding to a plurality of data and a pilot difference value, and the pilot difference value is generated using the data and the pilot reference value.

Claims

1. A method for processing a signal, the method comprising:

receiving broadcast signals including a video stream and an audio stream from an internet network, the broadcast signals encapsulated by an internet protocol and decapsulating the encapsulated broadcast signals;

demultiplexing the broadcast signals into the video stream and the audio stream to be encoded by a data coding scheme;

obtaining data coding identification information from the audio stream;

obtaining audio data units of a current frame using a pilot reference value and pilot difference values without using audio data units in other frame; and

decoding the audio data units of a current frame according to the data coding scheme indicated by the data coding identification information and a gain,

wherein the data coding scheme includes a pilot coding scheme,

wherein the pilot coding scheme corresponds to a scheme for decoding the audio data using the pilot reference value and the pilot difference values,

wherein the pilot reference value is dependent on the audio data units in the current frame and is independent on the audio data units in the other frame,

wherein the pilot difference values are generated using the audio data units in the current frame and the pilot reference value,

wherein the pilot reference value corresponds to the audio data units in the current frame, wherein the pilot difference values correspond to each of the audio data units in the current frame, and wherein number of the pilot difference values is equal to number of the plurality of audio data units, and

wherein the pilot reference value is a single value that applies to all audio data units in the current frame.

2. The method of claim 1, wherein the data coding scheme further includes a differential coding scheme, wherein the differential coding scheme comprises at least one of a frequency differential coding scheme and a time differential coding scheme, and wherein the time differential coding scheme comprises at least one of a forward time differential coding scheme and a backward time differential coding scheme.

3. The method of claim 1, wherein the obtaining step further comprises obtaining entropy coding identification information and the decoding step further comprises entropy-decoding the data using an entropy coding scheme indicated by the entropy coding identification information.

4. The method of claim 3, wherein the entropy decoding scheme is at least one of a one-dimensional coding scheme and a multi-dimensional coding scheme and the multi-dimensional coding scheme is at least one of a frequency pair coding scheme and a time pair coding scheme.

5. An apparatus for signal processing, the apparatus comprising:

a receiver receiving broadcast signals including a video stream and an audio stream from an internet network, the broadcast signals encapsulated by an internet protocol and decapsulating the encapsulated broadcast signals;

a demultiiplexer demultiplexing the broadcast signals into the video stream and the audio stream to be encoded by a data coding scheme; and

a decoder obtaining data coding identification information from the audio stream, obtaining audio data units of a current frame using a pilot reference value and a pilot difference value without using audio data units in other frame, and decoding the audio data according to the data coding scheme indicated by the data coding identification information,

wherein the data coding scheme includes a pilot coding scheme,

wherein the pilot coding scheme corresponds to a scheme for decoding the audio data using the pilot reference value and the pilot difference values,

wherein the pilot reference value is dependent on the audio data units in the current frame and is independent on the audio data units in the other frame, and

wherein the pilot difference values are generated using the audio data units in the current frame and the pilot reference value

wherein the pilot reference value is same value to the audio data units in the current frame, wherein the pilot reference value is a single value that applies to all audio data units in the current frame,

wherein the pilot difference values correspond to the audio data units in the current frame, and

wherein number of the pilot difference values is equal to number of the audio data units in the current frame.