MPEG Digital Compression Standards Section III on MPEG4
- Slides: 6
MPEG Digital Compression Standards Section III on MPEG-4 Lesley F. E. Jacques
Naming The MPEG Standards n MPEG-1 MPEG-2 MPEG-3 MPEG-4 n MPEG-7 n MPEG-21 Multimedia Framework Infrastructure For The n n n CD Storage Of Multimedia Information Digital TV And HDTV Abandoned? Diverse, Interactive, Scaleable, Versatile Encoding, Decoding And Storage Of Multimedia Content Description Interface, Semantic Information--2002? Consumption And Delivery Of Multimedia Information--2009?
MPEG-4 Goals/Objectives n Wide Bandwidth Accessibility: Effectiveness in both low and high bandwith enviroments n Compression Efficiency: Efficient coding of multiple concurrent data streams n Interactivity: Content based access and manipulation of data n Universal Access: Diverse multimedia data types and applications
Object Based Video Encoding P-VOP B-VOP I-VOP Binary Shape Coding • Video Object Planes • Binary Shape Coding • Gray Scale Shape Coding • Sprite Based Coding • Multiplexed Data Streams
Audio Encoding n Sound Objects: Placed individually in a sound space eg: Speech, Reverb, Synthetic Sound, Natural Sound n SAOL: Structured Audio Orchestra Language n Environmental Spatialization: Varies sound depending on room definition
Meeting The Goals n Low Bandwidth Applications: Scalable code in terms of quality, presentation rate and selection of objects via BIFS & SAOL Interaction: BIFS & SAOL n Improved Compression: Sprites, Local terminal n based scalability & interaction n Diverse Multimedia Information: Video (arbitrary shape), Audio, Natural, Synthetic, 2 D, 3 D, Streamed.
