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Information theory and coding { Image, video and audio ...
https://techheap.packetizer.com/compression/avc/audio_and_video_coding.pdf
Select an encoding parameterb. Letnbe the natural number to be encoded,q=bn=bcandr=n qb.Encodenas the unary code word forq, followed by the (log 2b)-bitbinarycodewordforr. Wherebis not a power of 2, encode the lower values ofrinblog 2bcbits, and the rest indlog 2be bits, such that the leading digits distinguish the two cases. 4 Examples:
AUDIO CODING STANDARDS - www.mp3-tech.org
http://www.mp3-tech.org/programmer/docs/AudioCoding.pdf
format, MPEG-2 AAC (Advanced Audio Coding) is unconstrained and can therefore provide better coding efficiency. The most recent development is the adoption of MPEG-4 [ISO, 1999] for very-low-bit-rate channels, such as those found in Internet and mobile applications. Table 1 lists the configuration used in MPEG audio coding standards. 3
Video Coding Standards - University of California, Berkeley
https://inst.eecs.berkeley.edu/~ee290t/sp04/lectures/coding_standards.pdf
– MPEG-2 video high profile at high level is the video coding standard used in HDTV • Test in 11/91, Committee Draft 11/93 • ISO/IEC 13818-1~6 (Systems, video, audio, compliance, software, DSM-CC) • Consist of various profiles and levels • Backward compatible with MPEG1 • MPEG-2 Audio – Support 5.1 channel
Video Coding Basics - University of California, Berkeley
https://inst.eecs.berkeley.edu/~ee290t/sp04/lectures/video_coding.pdf
Video Coding Basics Yao Wang Polytechnic University, Brooklyn, NY11201 [email protected]
~yao Yao Wang Audio Coding - New York University
https://eeweb.engineering.nyu.edu/~yao/EE3414/audio_coding.pdf
©Yao Wang, 2004 EE3414: Audio Coding 18 Basic Steps in MPEG-1 Audio Coding 1. Use convolution filters to divide the audio signal into 32 frequency subbands --> sub-band filtering. 2. Determine amount of masking for each band based on its frequency (threshold-in-quiet), and the energy of its neighboring band in frequency and time
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