DocumentCode :
913845
Title :
A Video Codec Transmitter
Author :
Lee, Shan ; Rao, K.R.
Author_Institution :
Compression Labs, Inc.
Issue :
2
fYear :
1981
fDate :
6/1/1981 12:00:00 AM
Firstpage :
29
Lastpage :
38
Abstract :
The transmitter of a video codec system is designed and realized in ECL hardware. This video codec system is capable of carrying one commercial NTSC color television channel with a program audio channel at a rate of 42.9 Mb/s. The transmitter interfaces with a DPCM processor. The transmitter removes the horizontal blanking interval from the composite television signal, converts the quantized difference signal from the DPCM processor into 4/8-bit dual length code and buffers the codes for constant rate transmission. A line synchronization code is multiplexed with audio and video codes to form a serial data link at 42.9 Mb/s. This can be transmitted on a T3 (44.7 Mb/s) digital carrier. The transmitter is composed of four functional units: controller, coder, buffer and multiplexer. This paper describes the design, layout, testing and evaluation of the high speed digital system that results in 2 to 1 data compression of the digital video.
Keywords :
Blanking; Data compression; Digital systems; Hardware; Multiplexing; Signal processing; System testing; TV; Transmitters; Video codecs;
fLanguage :
English
Journal_Title :
Broadcasting, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9316
Type :
jour
DOI :
10.1109/TBC.1981.266401
Filename :
4044228
Link To Document :
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