Title :
Variable bit-rate coding of video signals for ATM networks
Author :
Kishino, Fumio ; Manabe, Katsutoshi ; Hayashi, Yasuhito ; Yasuda, Hiroshi
Author_Institution :
NTT Human Interface Lab., Kanagawa, Japan
fDate :
6/1/1989 12:00:00 AM
Abstract :
Statistical characteristics of video signals for video packet coding, are clarified and a variable-bit-rate coding method for asynchronous transfer mode (ATM) networks is described that is capable of compensating for packet loss. ATM capabilities are shown to be greatly affected by delay, delay jitter, and packet loss probability. Packet loss has the greatest influence on picture quality. Packets may be lost either due to random bit error in a cell header or to network control when traffic is congested. A layered coding technique using discrete-cosine transform (DCT) coding is presented which is suitable for packet loss compensation. The influence of packet loss on picture quality is discussed, and decoded pictures with packet loss are shown. The proposed algorithm was verified by computer simulations
Keywords :
decoding; digital communication systems; encoding; packet switching; picture processing; statistical analysis; telecommunication networks; video signals; visual communication; ATM networks; DCT coding; asynchronous transfer mode networks; cell header; delay jitter; discrete-cosine transform; layered coding technique; network control; packet loss compensation; packet loss probability; picture quality; random bit error; statistical characteristics; traffic congestion; variable-bit-rate coding; video packet coding; video signals; Asynchronous transfer mode; Communication system traffic control; Decoding; Delay; Discrete cosine transforms; Discrete transforms; Error correction; Jitter; Probability; Traffic control;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
