Method of processing a signal and apparatus for processing a signal

• US 8,203,930 B2
• Filed: 10/04/2006
• Issued: 06/19/2012
• 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, Hyen O, Pang, Hee Suk, Kim, Dong Soo, Lim, Jae Hyun, Jung, Yang Won
• Primary Examiner(s): RENNER, BRANDON M
• Application Number:
  US12/083,081
• Publication Number:
  US 20090161695A1
• Time in Patent Office: 2,085 Days
• Field of Search: 370/474, 375/286, 375/287, 375/242, 375/295, 348/375
• US Class Current: 370/208
• 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 a pilot reference value corresponding to a plurality of data and a pilot difference value corresponding the pilot reference value from the decapsulated signal and obtaining the data using the pilot reference value and the pilot difference value.

Claims

1. A method for processing a signal using pilot based coding “

PBC”

, the method comprising;

receiving broadcast signals including video stream and audio stream from an internet network;

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

extracting a pilot reference value and pilot difference values from a group included in the audio data; and

obtaining data elements by adding the pilot reference value and the pilot difference values,

wherein;

the pilot reference value is decided by using each of the data elements of the group,

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

each pilot difference value of the group is decided by using each data element of the group and the pilot reference value, and

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

2. The method of claim 1, wherein in the obtaining step, the data are obtained by at least one parameter of a channel level difference “

CLD”

, an inter-channel coherence “

ICC” and

an arbitrary downmix gain “

ADG”

.

3. The method of claim 1, wherein the pilot reference value is one of an average value, an intermediate value, a most frequently used value and a default value of the plurality of data elements.

4. The method of claim 1, wherein the pilot reference value is one value extracted from a table.

5. The method of claim 1, further comprising selecting data having highest encoding efficiency as a final pilot reference value after the pilot reference value has been set to each of the plurality of data elements.

6. An apparatus for processing a signal using pilot based coding “

PBC”

, the apparatus comprising;

a demultiplexer demultiplexing broadcast signals into video stream and audio stream, the audio stream including audio data encoded by a data coding scheme; and

a decoder extracting a pilot reference value and pilot difference values and obtaining data elements by adding the pilot reference value and the pilot difference values,

wherein;

the pilot reference value is decided by using each of the data elements of the group,

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

each pilot difference value of the group is decided by using each data element of the group and the pilot reference value, and

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

7. A method for processing a signal using pilot based coding “

PBC”

, the method comprising;

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 the data elements of a group in the audio data;

multiplexing video stream and the audio stream to output broadcast signals, the audio stream including the audio data; and

transmitting the broadcast signals including the video stream and the audio stream through an internet network,

wherein;

the pilot reference value is decided by using each of the data elements of the group,

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

each pilot difference value of the group is decided by using each data element of the group and the pilot reference value, and

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

8. An apparatus for processing a signal using pilot based coding “

PBC”

, the apparatus comprising;

an 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 the data elements of a group in the audio data; and

a multiplexer multiplexing video stream and the audio stream to output broadcast signals, the audio stream including the audio data,

wherein;

the pilot reference value is decided by using each of the data elements of the group,

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

each pilot difference value of the group is decided by using each data element of the group and the pilot reference value, and

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