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WO2004002041A3 - Broadcast router having a multirate serial digital audio data stream encoder - Google Patents

Broadcast router having a multirate serial digital audio data stream encoder Download PDF

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Publication number
WO2004002041A3
WO2004002041A3 PCT/US2003/019390 US0319390W WO2004002041A3 WO 2004002041 A3 WO2004002041 A3 WO 2004002041A3 US 0319390 W US0319390 W US 0319390W WO 2004002041 A3 WO2004002041 A3 WO 2004002041A3
Authority
WO
WIPO (PCT)
Prior art keywords
audio data
digital audio
bit
data stream
frame
Prior art date
Application number
PCT/US2003/019390
Other languages
French (fr)
Other versions
WO2004002041A2 (en
Inventor
Carl Christensen
David Lynn Bytheway
Lynn Howard Arbuckle
Original Assignee
Thomson Licensing Sa
Carl Christensen
David Lynn Bytheway
Lynn Howard Arbuckle
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson Licensing Sa, Carl Christensen, David Lynn Bytheway, Lynn Howard Arbuckle filed Critical Thomson Licensing Sa
Priority to AU2003251573A priority Critical patent/AU2003251573A1/en
Publication of WO2004002041A2 publication Critical patent/WO2004002041A2/en
Publication of WO2004002041A3 publication Critical patent/WO2004002041A3/en

Links

Classifications

    • 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
    • G10L19/04—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 using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/22—Mode decision, i.e. based on audio signal content versus external parameters

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

An average bit time (406) and an excess sample count (406) are determined for a selected N-bit frame of AES serialized output digital audio data (404) to be encoded. An N-bit bi-phase encoded frame is then constructed (412, 414) from the N-bit frame of digital audio data, the average bit time, the excess sample count and a selected bit sampling rate (401) for the digital audio data stream. If the excess sample count is determined to be equal to zero (410), each data bit of the encoded frame would have the same time duration and thus contain the same number of samples therein (412). If the excess sample count is determined to be greater than zero (410), X bits of the encoded frame would have a time duration greater and thus contain a greater number of samples than that of the remaining N-X bits of the encoded frame (414).
PCT/US2003/019390 2002-06-21 2003-06-20 Broadcast router having a multirate serial digital audio data stream encoder WO2004002041A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003251573A AU2003251573A1 (en) 2002-06-21 2003-06-20 Broadcast router having a multirate serial digital audio data stream encoder

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US39035302P 2002-06-21 2002-06-21
US60/390,353 2002-06-21

Publications (2)

Publication Number Publication Date
WO2004002041A2 WO2004002041A2 (en) 2003-12-31
WO2004002041A3 true WO2004002041A3 (en) 2004-04-08

Family

ID=30000546

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/019390 WO2004002041A2 (en) 2002-06-21 2003-06-20 Broadcast router having a multirate serial digital audio data stream encoder

Country Status (2)

Country Link
AU (1) AU2003251573A1 (en)
WO (1) WO2004002041A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003238236A1 (en) 2002-06-21 2004-01-06 Thomson Licensing S.A. A fault-tolerant broadcast router

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4757521A (en) * 1984-05-17 1988-07-12 Tie/Communications, Inc. Synchronization method and apparatus for a telephone switching system
US6101475A (en) * 1994-02-22 2000-08-08 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung Method for the cascaded coding and decoding of audio data
US6272182B1 (en) * 1995-11-21 2001-08-07 U.S. Philips Corporation Digital transmission system for transmitting a digital audio signal being in the form of samples of a specific wordlength and occurring at a specific sampling rate
US20010028686A1 (en) * 1992-09-24 2001-10-11 Siemens Information And Communications Networks, Inc. Serial line synchronization method and apparatus
US6396877B1 (en) * 1998-01-27 2002-05-28 Agere Systems Guardian Corp. Method and apparatus for combining serial data with a clock signal
US20040003109A1 (en) * 2002-06-26 2004-01-01 Knapp David J. Communication system and method for sending isochronous streaming data across a synchronous network within a frame segment using a coding violation to signify invalid or empty bytes within the frame segment
US6680939B1 (en) * 2000-09-14 2004-01-20 Nvision, Inc Expandable router

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4757521A (en) * 1984-05-17 1988-07-12 Tie/Communications, Inc. Synchronization method and apparatus for a telephone switching system
US20010028686A1 (en) * 1992-09-24 2001-10-11 Siemens Information And Communications Networks, Inc. Serial line synchronization method and apparatus
US6101475A (en) * 1994-02-22 2000-08-08 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung Method for the cascaded coding and decoding of audio data
US6272182B1 (en) * 1995-11-21 2001-08-07 U.S. Philips Corporation Digital transmission system for transmitting a digital audio signal being in the form of samples of a specific wordlength and occurring at a specific sampling rate
US6396877B1 (en) * 1998-01-27 2002-05-28 Agere Systems Guardian Corp. Method and apparatus for combining serial data with a clock signal
US6680939B1 (en) * 2000-09-14 2004-01-20 Nvision, Inc Expandable router
US20040003109A1 (en) * 2002-06-26 2004-01-01 Knapp David J. Communication system and method for sending isochronous streaming data across a synchronous network within a frame segment using a coding violation to signify invalid or empty bytes within the frame segment

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BAKER J.S.: "Sierra video systems", SERIAL DIGITAL AUDIO; AUDIO VIDEO & BROADCASTING STUDIO SYSTEMS, September 2002 (2002-09-01), XP002972435, Retrieved from the Internet <URL:http://www.studio-systems.com> *

Also Published As

Publication number Publication date
AU2003251573A1 (en) 2004-01-06
AU2003251573A8 (en) 2004-01-06
WO2004002041A2 (en) 2003-12-31

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