演講公告 Dr. Fengduo Hu Abstract : In the last decade CD-quality digital audio has essentially...
-
Upload
allan-dennis -
Category
Documents
-
view
213 -
download
0
Transcript of 演講公告 Dr. Fengduo Hu Abstract : In the last decade CD-quality digital audio has essentially...
演講公告
Dr. Fengduo Hu
Abstract :Abstract :
In the last decade In the last decade CD-quality digital audio has essentially replaced analog audioCD-quality digital audio has essentially replaced analog audio and resulted i and resulted in a digital revolutionn a digital revolution. . Despite the advance of the Internet and wireless communications, Despite the advance of the Internet and wireless communications, digital audio digital audio facefacedd seri seriouous s challengeschallenges due todue to reduced channel bandwidth, limited storage capacity reduced channel bandwidth, limited storage capacity,, and low and low costcost requirements requirements. These challenges have motivated . These challenges have motivated further further research research inin advanced audioadvanced audio compression. Several international compression standards have compression. Several international compression standards have been adopted in the been adopted in the commercial commercial worldworld. A good example is MP3. . A good example is MP3. This seminar includes two parts. In partThis seminar includes two parts. In part 1 1, the , the psychoacoustic principles psychoacoustic principles of audio perception of audio perception are presentedare presented first first. . The The time-to-frequency time-to-frequency mapping techniques are discussed. Then mapping techniques are discussed. Then the the two most commontwo most commonlyly used audio coders, subband used audio coders, subband coder and transform coder, are reviewed. Finally, evaluation methodologies for audio codec coder and transform coder, are reviewed. Finally, evaluation methodologies for audio codec are described. In part 2, a brief introduction to MPEG are described. In part 2, a brief introduction to MPEG audio coding audio coding standardsstandards family and family and their their applications and history is applications and history is presented. This is followed by a detailed description of the presented. This is followed by a detailed description of the MP3 encodMP3 encodiningg and decod and decodinging schemes.schemes.
Biography :Biography :
Fengduo Hu received the M.S. and Ph.D. degree in Electrical Engineering from Syracuse Fengduo Hu received the M.S. and Ph.D. degree in Electrical Engineering from Syracuse University, Syracuse, New York, USA, in 1988 and 1990, respectively.University, Syracuse, New York, USA, in 1988 and 1990, respectively.
DuringDuring 1991-1992, he was a Research Scientist at Entropic Speech Inc, Cupertino, California 1991-1992, he was a Research Scientist at Entropic Speech Inc, Cupertino, California,, where h where he worked on low bit rate speech coders and echo cancellers. From 1993 to 1994, He e worked on low bit rate speech coders and echo cancellers. From 1993 to 1994, He was with Zilog Inc, Campell, Cwas with Zilog Inc, Campell, CAA, where he worked on DSP algorithms and chip architecture , where he worked on DSP algorithms and chip architecture design for digital cordless phone, digital telephone answering devicedesign for digital cordless phone, digital telephone answering device,, and PC audio. From 1995 and PC audio. From 1995 to 2000, he was a senior staff engineer and project leader at SONY, San Jose, Cto 2000, he was a senior staff engineer and project leader at SONY, San Jose, CA, where hA, where he was e was in charge of in charge of the the designdesign of of audio sub-system for SONY’s first non-linear editing system. He also audio sub-system for SONY’s first non-linear editing system. He also led the development and design led the development and design of of SONY’s MPEGSONY’s MPEG--2 audio/ Dolby AC3 encoder chip for DVR 2 audio/ Dolby AC3 encoder chip for DVR applicationapplicationss. From 2001 to 2002, . From 2001 to 2002, hhe was e was aa senior staff software engineer at iVAST, Santa Clara, senior staff software engineer at iVAST, Santa Clara, CC A, where hA, where he was responsible for e was responsible for the development of the development of MPEGMPEG--4 audio codec and 4 audio codec and the the specification specification oof APIs f APIs for MPEGfor MPEG--4 authoring tool and player. 4 authoring tool and player. Since Feb. 2003, he has been with Since Feb. 2003, he has been with ITE USA as a senior ITE USA as a senior staff firmware engineer and project leaderstaff firmware engineer and project leader, responsible for the development of, responsible for the development of audio compression audio compression algorithms for personal audio applications. algorithms for personal audio applications.
Dr. Hu’sDr. Hu’s research interests are in the area of spectrum estimation, speech/audio synthesis, research interests are in the area of spectrum estimation, speech/audio synthesis, speech/audio coding, and fast DSP implementation. He holds 4 US patents and has 4 pending. speech/audio coding, and fast DSP implementation. He holds 4 US patents and has 4 pending. He is a senior member of IEEE Signal Processing Society.He is a senior member of IEEE Signal Processing Society.
時間 : 92 年 10 月 9 日 ( 星期四 ) 下午1:30~3:00
地點 : 電機二館 R142
Audio Compression and MP3
台大電信所 92.10.03