85 videocompress

MPEG: A Video Compression Standard for Multimedia Applications V áclav Hlaváč CTU Prague, [email_address] Initial material were slides of Didier Le Gall, Worcherster Polytechnic Institute.

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Need for Video Compression ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Compatibility Goals ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Requirements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Relevant Standards ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

MPEG Compression ,[object Object],[object Object],[object Object]

Spatial Redundancy ,[object Object]

Spatial Redundancy Reduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Spatial Redundancy Reduction Zig-Zag Scan, Run-length coding “Intra-Frame Encoded” ,[object Object],[object Object],[object Object]

Question ,[object Object],[object Object]

Answer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Loss of Resolution Original (63 kb) Low (7kb) Very Low (4 kb)

Temporal Redundancy ,[object Object],950 951 952

Temporal Activity “Talking Head”

Temporal Redundancy Reduction ,[object Object],[object Object],[object Object],[object Object],[object Object]

Group of Pictures (GOP) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Answer ,[object Object],[object Object],[object Object]

Non-Temporal Redundancy ,[object Object]

Typical Compress. Performance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Note, results are Variable Bit Rate, even if frame rate is constant

MPEG Today ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

MPEG Today ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

MPEG Tools ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

85 videocompress

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85 videocompress