방송공학회논문지 (Journal of Broadcast Engineering)

  • 제10권3호
  • /
  • Pages.261-269
  • /
  • 2005
  • /
  • 1226-7953(pISSN)
  • /
  • 2287-9137(eISSN)
한국방송∙미디어공학회 (The Korean Institute of Broadcast and Media Engineers)
권호 표지

유무선망에서 사용되는 디지털 음성 부호화 기술 동향

Digital Speech Coding Technologies for Wire and Wireless Communication

  • 윤병식 (한양대학교 전자컴퓨터공학부, 한국전자통신연구원 이동통신연구단) ;
  • 최송인 (한국전자통신연구원 이동통신연구단) ;
  • 강상원 (한양대학교 전자컴퓨터공학부)
  • Yoon, Byungsik (Hanyang University, Electronics & Computer Engineering Department, ETRI, Mobile Telecommunication Research Division) ;
  • Choi, Songin (ETRI, Mobile Telecommunication Research Division) ;
  • Kang, Sangwon (ETRI, Mobile Telecommunication Research Division)
  • 발행 : 2005.09.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

디지털 음성 부호화기는 디지털 통신 시스템의 음성 압축 수단으로 이용되어 왔으며 심한 채널에러와 한정된 주파수 자원과 같은 디지털 무선 통신 시스템 환경에 적합하게 더욱 발전해왔다. 또한 디지털 통신 기술의 비약적인 발전에 따라 사용자는 더욱 높은 수준에 해당하는 음성 서비스를 요구하게 되고 그로 인하여 단순히 의사 전달에 해당하는 음성 서비스에서 높은 수준의 멀티미디어 콘텐츠들을 수용할 수 있는 음성 및 오디오 부호화기의 기술개발로 급격히 전환 되고 있다. 본 논문에서는 유선 및 무선 디지털망에서 사용되어지는 음성 / 오디오 부호화기의 기술에 대하여 살펴보고 이와 관련된 표준화 활동 및 기술동향에 대하여 알아본다. 또한 향후 유무선 디지털망의 발전에 따른 디지털 음성 / 오디오 부호화기술의 발전 방향에 대하여 언급한다.

Throughout the history of digital communication, the digital speech coder is used as speech compression tool. Nowadays, the speech coder has been rapidly developed in the area of mobile communication system to overcome severe channel error and limitation of radio frequency resources. Due to the development of high performance communication system, high quality of speech coder is needed. This kind of speech coder can be used not only in communication services but also in digital multimedia services. In this paper, we describe the technologies of digital speech coder which are used in wire and wireless communication. We also present a summary of recent speech coding standards for narrowband and wideband applications. Finally we introduce the technical trends of next generation speech coder.

키워드

참고문헌

  1. J. F. Boag : 'The end of the first pulse-code modulation era in the UK' The Post Office Electrical Engineers Journal, 71, Part 1, pp 2-4, April 1978
  2. B.S. Atal and M. R. Schoeder, 'Stochastic coding of speech at very low bit rates,' in Proc. Int. Conf. Comm., 1984, pp. 1610-1613
  3. W.B. Kleijn and K.K. Paliwal, Speech Coding and synthesis, Elsevier, 1995
  4. ITU-T Rec. G.711, 'Pulse code modulation (PCM) of voice frequencies,' Nov. 1988
  5. ITU-T Rec. G.726, '40, 32, 24, 16kbit/s adaptive differential pulse code modulation (ADPCM),' Dec. 1990
  6. ITU-T Rec. G.728, 'Coding of speech at 16kbit/s using low-delay code-excited linear prediction,' 1992
  7. ITU-T Rec. G.723.1, 'Dual-rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s,' May 1996
  8. ITU-T Rec. G.729, 'Coding of speech at 8 kbit/s using conjugate- structure algebraic code-excited linear prediction (CS-ACELP),' May 1996
  9. ITU-T Rec. G.722, '7 kHz audio-coding with 64 kbit/s,' Nov. 1988
  10. ITU-T Rec. G.722.2 'Wideband coding of speech at around 16 kbit/s using Adaptive Multi-rate Wideband (AMR-WB),' Jan. 2002
  11. Rec. GSM 06.20, 'European digital cellular telecommunications system; Half-rate speech; Part 1: Half rate speech processing functions,' Dec. 1995
  12. Rec. GSM 06.60, 'Digital cellular telecommu nications system(Phase 2+) (GSM); Enhanced Full Rate(EFR) speech transcoding,' July 1999
  13. 3GPP Rec. TS 26.090 'AMR speech coder; Transcoding functions,' Jun. 2002
  14. TIA/EIA IS-54, 'Cellular system dual-mode mobile station-base station compatibility standard,' May, 1990
  15. TIA/EIA IS-96 'Speech Service Option Standard for Wideband Spread Spectrum Digital Cellular System,' Apr. 1994
  16. TIA/EIA/IS-733, 'High rate service option 17 for wideband spread spctrum communication system,' Mar. 1997
  17. TIA/EIA/IS-127, 'Enhanced variable rate codec, speech service option 3 for wideband spread spectrum digital systems,' Jan. 1997
  18. TIA/EIA/IS-893, 'Selectable mode vocoder service option for wideband spread spectrum communication system,' Jun. 2005
  19. TIA-1016. 'CDMA2000 wideband codec algorithm description,', Oct. 2004
  20. K. Mano et al. 'Design of a pitch synchro nous innovation CELP coder for mobile communications,', IEEE J. Select. Areas Commun., vol. 13, no. 1, pp. 31-41, 1995 https://doi.org/10.1109/49.363148
  21. S. Dimolitsas et al. 'Evaluation of Voice Codec Performance for the Inmarsat Mini-M System,' Proceedings, 10th Int. Digital Satellite, Brighton, England, May, 1995
  22. L. Supplee, et al. 'MELP: The new federal standard at 2400 bps,' ICASSP-97, Munich, Germany
  23. ISO/IEC 14496-3, Information technology coding of audio-visaul objects, Part 3: Audio, Subpart 2: Speech Coding HV C, Nov. 1998
  24. S. V. Andersen et al. 'iLBC - a linear predictive coder with robustness to packet losses,' Speech Coding, IEEE Workshop Proceedings, pp. 23-25, Oct. 2002
  25. 3GPP Rec. TS. 26.290, 'Audio codec processing functions; Extended Adaptive Multi-Rate - Wideband (AMR-WB+) codec; Transcoding functions,' 2004
  26. 3GPP Rec. TS. 26.401, 'General audio codec audio processing functions; Enhanced aacPlus general audio codec; General description,' 2004