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DIGITAL AUDIO INTERFACE FOR DRA ENCODED AUDIO BITSTREAMS

DIGITAL AUDIO INTERFACE FOR DRA ENCODED AUDIO BITSTREAMS. Contents. Introduction of DRA and 100/1447/NP Industrialization progress of DRA technology Why we need an identifier of IEC 60958 Details of IEC 61937 DIF for DRA. Contents. Introduction of DRA and 100/1447/NP

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DIGITAL AUDIO INTERFACE FOR DRA ENCODED AUDIO BITSTREAMS

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  1. DIGITAL AUDIO INTERFACE FOR DRA ENCODED AUDIO BITSTREAMS

  2. Contents • Introduction of DRA and 100/1447/NP • Industrialization progress of DRA technology • Why we need an identifier of IEC 60958 • Details of IEC 61937 DIF for DRA

  3. Contents • Introduction of DRA and 100/1447/NP • Industrialization progress of DRA technology • Why we need an identifier of IEC 60958 • Details of IEC 61937 DIF for DRA

  4. DRA（Digital Rise Audio） technology An Audio compressing technology as China industry standard • Name of the Standard： 《Specification for Multichannel Digital Audio Coding Technology 》 • Number of the Standard ： SJ/T11386-2006 • Issued date： Jan 4, 2007 • Issued department： Ministry of Information Industry of PRC (Now named as “MIIT”) It will be published as China national standard at the end of this year DRA Audio compressing technology can be used in: • DAB (Digital Audio Broadcasting) • MMB (Mobile Multimedia Broadcasting), • NM (Network Multimedia), • DTV • DVD

  5. Technical specification and audio quality • Formal listening test in China —— MOS score = 4.9/5.0 (July, 2007: by State Administration of Radio Film and Television) • Also passed the BDA‘s audio quality assessments in Japan (Feb.17, 2008: Tokyo) and USA (April, 2008: Hollywood)

  6. Position for 100/1447/NP partly enlarged Copy from <IEC 61937-2: 2007>

  7. Contents • Introduction of DRA and 100/1447/NP • Industrialization progress of DRA technology • Why we need an identifier of IEC 60958 • Details of IEC 61937 DIF for DRA

  8. From BD "We are very happy that DRA, an original Chinese audio coding technology, has passed the BDA technical evaluation. The BDA is now taking final steps to formally adopt DRA as part of the format. “——— Matsumura-san （Pioneer） chair of BDA China Task Force “DigiRise DRA (DRA) digital audio coding technology has passed an important technical evaluation” ——— Kawawuchi-san（SONY） CFO of BDA "We will continue to work closely with BDA in order to complete the remaining procedures and ensure that DRA technology will be adopted by the Blu-ray Disc format as soon as possible.“——— Songhe Yin vice president of China Hualu Group. Blu-ray Disc Association (BDA) has accepted DRA audio coding technology as one part of BD Specification

  9. From SMPTEMPEG available identifier for DRA • TS format identifier (assigned by SMPTE)： 0x44524131(“DRA1”) , used in PMT of MPEG-2 TS steam, 2008 • After that, BDA has added TS format identifier into BD draft Specification.

  10. CMMB project in China • DRA : the mandatory technology in CMMB standard in China; • DRA hardware encoder for CMMB： • receiving terminal for CMMB： DRA-CMMB receiver

  11. CMMB project Other copartners in CMMB project DRA-CMMB signals are broadcasting in more than 30 cities in China,2008

  12. DTV application in China • DTV receiver specification: DRA —— audio part • Broadcasting 5.1 channel DRA-DTV signal: Guangdong Province • DRA-DTV chips providers signed agreement on chip design

  13. Contents • Introduction of DRA and 100/1447/NP • Industrialization progress of DRA technology • Why we need an identifier of IEC 60958 • Details of IEC 61937 DIF for DRA

  14. identifier for DRA in IEC 60958 • Lots of requirements for receiving and/or transmitting DRA through IEC 60958 interface

  15. If IEC 61937 DIF for DRA issued by TC100: • More manufactures can develop chips or terminals supporting IEC 61937 DIF for DRA • More people can use and be familiar with IEC 61937 DIF for DRA • IEC 61937 DIF will become more popular

  16. Contents • Introduction of DRA and 100/1447/NP • Industrialization progress of DRA technology • Why we need an identifier of IEC 60958 • Details of IEC 61937 DIF for DRA

  17. Position of DRA new proposal

  18. Details of IEC 61937 DIF for DRA

  19. Details of IEC 61937 DIF for DRA

  20. Thanks

  21. What we need IEC help us? • Get the official number of Data-type Bits 0-4 of Pc

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