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Audio and Video Compression - SlideShare
https://www.slideshare.net/apashishp/audio-and-video-compression-64399575
AUDIO LEVEL COMPRESSION • Downward compression reduces loud sounds over a certain threshold while quiet sounds remain unaffected. • Upward compression increases the loudness of sounds below a certain threshold while leaving louder sounds unaffected. 9.
Audio and video compression - SlideShare
https://www.slideshare.net/neeraj9217/audio-and-video-compression
perceptual coding (pc) lpc and celp are used only for telephony applications and hence compression of speech signal. pc are designed for compression of general audio such as that associated with a digital television broadcast. use a psychoacoustic model (this exploits a number of limitations of human ear). using this approach, sampled …
Simple Audio Compression Methods
https://users.ece.utexas.edu/~ryerraballi/MSB/pdfs/M4L4.pdf
MPEG-1: Bitrate of 1.5 Mbits/sec for audio and video About 12M. btis/sec for vdieo ,03M. btis/sec for audoi (Uncompressed CD audio is 44,100 samples/sec * 16 bits/sample * 2 channels > 1.4 Mbits/sec) Compression factor ranging from 2.7 to 24. With Compression rate 6:1 (16 bits stereo sampled at 48 KHz is reduced to 256 kbits/sec)
Audio Compression - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/computer-science/audio-compression
Here are the main steps in the audio compression process. 1. Sampling and preprocessing 2. Sub-band coding 3. Transform coding (optional) 4. Quantization according to psychoacoustic masking threshold 5. Multichannel bit allocation (optional) 6. Huffman coding
An explanation of video compression techniques.
https://www.reachcambridge.com/wp-content/uploads/wp_videocompression_33085_en_0809_lo.pdf
compression algorithm, the higher the latency. When using video compression and several adjacent frames are being compared in the compression algorithm, more latency is introduced. For some applications, like compression of studio movies, compression latency is irrelevant since the video is not watched live.
Video Compression Techniques: An Overview
https://scialert.net/fulltext/?doi=jas.2010.1834.1840
The MPEG-4 compression methods are used for texture mapping of 2-D and 3-D meshes, compression of time-varying streams and algorithms for spatial, temporal and quality scalability, images and video. Scalability is required for video transmission over heterogeneous networks so that the receiver obtains a full resolution display.
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