KR960027869A - Encoding / Decoding Method of Audio Data According to MPEG - Google Patents

Encoding / Decoding Method of Audio Data According to MPEG Download PDF

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Publication number
KR960027869A
KR960027869A KR1019940034716A KR19940034716A KR960027869A KR 960027869 A KR960027869 A KR 960027869A KR 1019940034716 A KR1019940034716 A KR 1019940034716A KR 19940034716 A KR19940034716 A KR 19940034716A KR 960027869 A KR960027869 A KR 960027869A
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South Korea
Prior art keywords
audio data
mpeg
bit allocation
data according
encoding
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KR1019940034716A
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Korean (ko)
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KR0130360B1 (en
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이성진
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구자홍
Lg 전자주식회사
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—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
    • G10L19/002—Dynamic bit allocation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—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
    • G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

본 발명은 MPEG(Moving Picture Experts Group)에 따른 오디오 테이타의 부호/복호화 방법에 관한 것으로 특히 MPEG 오디오 정보중에서 비트할당(Bit Allocation) 정보를 이용하여 스크램블링(Scrambling)을 하는 MPEG에 따른 오디오 데이터의부호/복호화 방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of encoding / decoding audio data according to Moving Picture Experts Group (MPEG). In particular, the present invention relates to encoding of audio data according to MPEG, which is scrambling using bit allocation information among MPEG audio information / Decryption method.

상기와 같은 본 발명의 MPEG에 따른 오디오 데이터의 부호/복호와 방법은 MPEG에 따른 오디오 데이터의 부호/복호화에 있어서, 보호할 오디오 프로그램을 선택하여, 오디오 비트스트림의 비트할당 정보를 이용하여 스크램블링을 하는 단계와,스크램블의 여부를 나타내는 오버헤드 정보를 비트스트림상에 코딩하여 전송하는 단계와, 수신된 비트스트림의 오버헤드정보를 Read하여 스크램블의 여부를 판단하는 단계와, 스크램블된 비트할당 정보만을 스크램블 해독기로 입력하여 디스크램블링 하는 단계와, 디스크램블된 비트할당 정보에 의해 오디오 데이터를 리포맷팅하고, MPEG 테이블에 의해 디코딩하여 PCM 데이터를 출력하는 단계를 포함하여 이루어진다.As described above, in the encoding / decoding and decoding of audio data according to MPEG of the present invention, in encoding / decoding of audio data according to MPEG, an audio program to be protected is selected and scrambling is performed using bit allocation information of an audio bitstream. And encoding and transmitting overhead information indicating whether or not scrambled on the bitstream, and determining whether or not to scramble by reading the overhead information of the received bitstream, and only scrambled bit allocation information. And descrambling the input to the scramble decoder, and reformatting the audio data according to the descrambled bit allocation information, and decoding the MPEG data to output PCM data.

Description

엠펙(MPEG)에 따른 오디오 데이터의 부호/복호화 방법Encoding / Decoding Method of Audio Data According to MPEG

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명의 스크램블/디스크램블 과정을 나타낸 플로우챠트.3 is a flowchart illustrating a scramble / descramble process of the present invention.

Claims (6)

MPEG에 따른 오디오 데이터의 복호화에 있어서, 오디오 비트스트림의 비트할당 정보를 스크램블링하여 전송된 비트스트림의 오버헤드 정보를 Read하여 스크램블의 여부를 판단하는 단계와, 스크램블된 비트할당 정보만을 스크램블 해독기로 입력하여 디스크램블링 하는 단계와, 디스크램블된 비트할당 정보에 의해 오디오 테이타를 리포맷팅하고,MPEG 테이블에 의해 디코딩하여 PCM 데이터를 출력하는 단계를 포함하여 이루어지는 것을 특징으로 하는MPEG에 따른 오디오 데이터의 부호/복호화 방법.In decoding the audio data according to MPEG, scrambled bit allocation information of the audio bitstream to read overhead information of the transmitted bitstream to determine whether to scramble, and input only scrambled bit allocation information to the scramble decoder. Decode the audio data according to the descrambled bit allocation information, decode the audio data according to the MPEG table, and output the PCM data. Decryption method. 제1항에 있어서, 오버헤드 정보는 오디오 비트스트림의 헤더정보 영역의 잉여비트(Private Bit)에 코딩되는 것을 특징으로 하는 MPEG에 따른 오디오 데이터의 부호/복호화 방법.2. The method according to claim 1, wherein the overhead information is coded in a private bit of a header information area of the audio bitstream. 제1항 에 있어서 오버헤드 정보는 오디오 비트스트림의 부가테이타 필드에 코딩되는 것을 특징으로 하는MPEG에 따른 오디오 데이터의 부호/복호화 방법.The method of claim 1, wherein the overhead information is coded in an additional data field of the audio bitstream. 제1항에 있어서, 오디오 데이터의 스크램블링은 비트할당 정보를 블록단위(Subband)로 셔플링(Shuffling)하는 것으로 이루어 지는 것을 특징으로 하는 MPEG에 따른 오디오 데이터의 부호/복호화 방법.The method of claim 1, wherein the scrambling of the audio data is performed by shuffling bit allocation information in block units (Subbands). 제1항에 있어서, 오디오 데이터의 스크램블링은 비트할당 정보의 부호화시에 MPEG 테이블의 데이터 값을셔플링(Shuffling)하는 것으로 이루어 지는 것을 특징으로 하는 MPEG에 따른 오디오 데이터의 부호/복호화 방법.The method of claim 1, wherein the scrambling of the audio data is performed by shuffling data values of the MPEG table at the time of encoding the bit allocation information. 제1항에 있어서,. 오디오 데이터의 스크램블링은 비트할당 정보를 블록단위(Subband)로 지연 또는 쉬프트시키는 것으로 이루어지는 것을 특징으로 하는 MPEG에 따른 오디오 데이터의 부호/복호화 방법.The method of claim 1, wherein: The scrambling of audio data comprises delaying or shifting bit allocation information in block units (subbands). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940034716A 1994-12-16 1994-12-16 Eencoding/decoding method for audio data KR0130360B1 (en)

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KR1019940034716A KR0130360B1 (en) 1994-12-16 1994-12-16 Eencoding/decoding method for audio data

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KR1019940034716A KR0130360B1 (en) 1994-12-16 1994-12-16 Eencoding/decoding method for audio data

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KR960027869A true KR960027869A (en) 1996-07-22
KR0130360B1 KR0130360B1 (en) 1998-04-14

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