演講公告 Dr. Fengduo Hu Abstract : In the last decade CD-quality digital audio has essentially...
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演演演演 Dr. Fengdu o Hu Abstract : Abstract : In the last decade In the last decade CD-quality digital audio has essentially replaced CD-quality digital audio has essentially replaced analog audio analog audio and resulted in a digital revolution and resulted in a digital revolution. . Despite the advance of the I Despite the advance of the I nternet and wireless communications, nternet and wireless communications, digital audio face digital audio faced seri seriou ous s challenges challenges due due to to reduced channel bandwidth, limited storage capacity reduced channel bandwidth, limited storage capacity, and low cost and low cost requiremen requiremen ts ts. These challenges have motivated . These challenges have motivated further further research research in in advanced audio advanced audio compression. Several international compression standards have compression. Several international compression standards have been adopted in t been adopted in t he he commercial commercial world world. A good example is MP3. . A good example is MP3. This seminar includes two parts. This seminar includes two parts. In part In part 1 1, the psychoacoustic principles , the psychoacoustic principles of audio perception of audio perception are presented are presented firs firs t. . The The time-to-frequency mapping techniques are discussed. Then time-to-frequency mapping techniques are discussed. Then the the two most two most common commonly ly used audio coders, subband coder and transform coder, are reviewed. used audio coders, subband coder and transform coder, are reviewed. Finally, evaluation methodologies for audio codec are described. In part 2, a Finally, evaluation methodologies for audio codec are described. In part 2, a brief introduction to MPEG brief introduction to MPEG audio coding audio coding standards standards family and family and their applications their applications and history is and history is presented. This is followed by a detailed description of the presented. This is followed by a detailed description of the MP3 encod MP3 encoding ing and decod and decoding ing schemes. schemes. Biography : Biography : Fengduo Hu received the M.S. and Ph.D. degree in Electrical Engineering Fengduo Hu received the M.S. and Ph.D. degree in Electrical Engineering from Syracuse University, Syracuse, New York, USA, in 1988 and 1990, from Syracuse University, Syracuse, New York, USA, in 1988 and 1990, respectively. respectively. During During 1991-1992, he was a Research Scientist at Entropic Speech Inc, 1991-1992, he was a Research Scientist at Entropic Speech Inc, Cupertino, California Cupertino, California, where h , where he worked on low bit rate speech coders and echo e worked on low bit rate speech coders and echo cancellers. From 1993 to 1994, He was with Zilog Inc, Campell, C cancellers. From 1993 to 1994, He was with Zilog Inc, Campell, CA, where he , where he worked on DSP algorithms and chip architecture design for digital cordless worked on DSP algorithms and chip architecture design for digital cordless phone, digital telephone answering device phone, digital telephone answering device, and PC audio. From 1995 to 2000, he and PC audio. From 1995 to 2000, he was a senior staff engineer and project leader at SONY, San Jose, C was a senior staff engineer and project leader at SONY, San Jose, CA, where h A, where he e was in charge of was in charge of the the design design of of audio sub-system for SONY’s first non-linear audio sub-system for SONY’s first non-linear editing system. He also led the development and design editing system. He also led the development and design of of SONY’s MPEG SONY’s MPEG-2 audio/ 2 audio/ Dolby AC3 encoder chip for DVR application Dolby AC3 encoder chip for DVR applications. From 2001 to 2002, . From 2001 to 2002, he was e was a senior senior staff software engineer at iVAST, Santa Clara, C staff software engineer at iVAST, Santa Clara, CA, where h A, where he was responsible for e was responsible for the development of the development of MPEG MPEG-4 audio codec and 4 audio codec and the the specification specification of APIs of APIs for MPEG for MPEG-4 4 authoring tool and player. authoring tool and player. Since Feb. 2003, he has been with Since Feb. 2003, he has been with ITE USA as a ITE USA as a senior staff firmware engineer and project leader senior staff firmware engineer and project leader, responsible for the developm , responsible for the developm ent of ent of audio compression algorithms for personal audio applications. audio compression algorithms for personal audio applications. Dr. Hu’s Dr. Hu’s research interests are in the area of spectrum estimation, research interests are in the area of spectrum estimation, speech/audio synthesis, speech/audio coding, and fast DSP implementation. He speech/audio synthesis, speech/audio coding, and fast DSP implementation. He holds 4 US patents and has 4 pending. He is a senior member of IEEE Signal holds 4 US patents and has 4 pending. He is a senior member of IEEE Signal Processing Society. Processing Society. 演演 : 92 演 10 演 9 演 ( 演演演 ) 演演 1:30 ~3:00 演演 : 演演演演 R142 Audio Compression and MP3 演演演演演 92.10.03
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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
