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Competition Convergence
1Prof. Tsuhan Chen
tsuhan@ece.cmu.edu
18-899 Special Topics in Signal Processing
Multimedia Communications:
Coding, Systems, and Networking
Lecture 6
MPEG-1
218-899/Spring 1998/Chen
Moving Picture Expert Group
? Moving Pictures Expert Group (MPEG)
– ISO/IEC JTC1/SC29/WG11
– Formed in Jan. 1988
? MPEG standards
– MPEG-1
– MPEG-2
– MPEG-4 (ongoing)
– MPEG-7 (ongoing)
? Specify only bitstream syntax and decoding
18-899/Spring 1998/Chen
MPEG-1/2
? MPEG-1
– Audio and video on storage media such as CD-ROM
? 1x CD-ROM: 150 KB/s = 1.2 Mbits/s
– Targeted at 1 to 1.5 Mbits/s
? ~1.2 Mbits/s for video, ~250 kbits/s for audio
? MPEG-2
– Digital TV: SDTV, HDTV
– Wide range of bit rates 4 to 80 Mbits/s
– Optimized around 4 Mbits/s
– Supports interlaced video and scalable coding
318-899/Spring 1998/Chen
MPEG-1
? Outline
– Applications and history
– Requirements
– New features (w.r.t. H.261)
– Simulation Model 3
– Bitstream syntax
– Video buffering verifier
18-899/Spring 1998/Chen
MPEG-1
? Applications
– Video on digital storage media
– Computer and telecommunication networks
? History
? 1988: started
? Sep. 1989: Proposal registration
? Oct. 1989: Subjective tests
? Mar. 1990: Definition of video algorithm (Simulation Model 1)
? Sep. 1990: Committee Draft for video
Competition
Convergence
418-899/Spring 1998/Chen
Parts of MPEG-1
? ISO/IEC 11172-1: Systems
? ISO/IEC 11172-2: Video
? ISO/IEC 11172-3: Audio
? ISO/IEC 11172-4: Conformance Testing
? ISO/IEC 11172-5: Software
18-899/Spring 1998/Chen
MPEG-1 System
? Decoder
518-899/Spring 1998/Chen
Requirements: Basic
? Coding of generic video with good quality (about
VHS video) at 1 to 1.5 Mbits/s
? Random access to a frame in limited time
– Frequent access points
? Fast forward/reverse
– Seek and play in FF/FR using access points
? System supporting audio-visual synchronized
play/access
? A practical/implementable decoder
18-899/Spring 1998/Chen
Requirements: Additional
? Reverse playback
– Access points and buffering
? Tradeoff quality
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