Adaptive-rate coded digital image transmission
First Claim
1. Apparatus for the transmission of digital images, comprising:
- a source of image information in digital form;
a transmitter coupled to said source for the transmission of digital image information;
an image data sink for utilizing received digital image information;
a receiver for receiving said digital image information and providing said received digital image information to said image data sink;
a communications channel between said transmitter and said receiver for transmission of image data from said transmitter to said receiver;
a feedback channel for providing quality information from said receiver to said transmitter, said information being indicative of quality of said received digital image information over said communication channel;
whereby said transmitter is responsive to said quality information such that transmission parameters are varied at said transmitter to provide high quality image information at said receiver; and
said feedback channel comprising;
a channel status monitor; and
a channel status estimator for instructing said channel status monitor to vary power level, baud rate, channel code rate, compression ratio and delivery rate of said transmitter for transmitting said digital image information.
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Accused Products
Abstract
An adaptive arrangement and method for the coded digital transmission of images includes an adaptive transmitter (101) having an image coder (109) which is operable at multiple image coding rates, a channel coder (111) which is operable at a plurality of channel coding rates, and is further operable to provide a plurality of power outputs, baud rates, and a plurality of image delivery rates. The transmitter (101) further includes a channel status monitor (115) which monitors the communication channel (105) connecting the transmitter (101) to a receiver (103). The channel status monitor (115) responds to changes in the quality of the communications channel by varying one or more of the image coding rate, the channel coding rate, the power, the baud rate, and the image delivery rate.
203 Citations
11 Claims
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1. Apparatus for the transmission of digital images, comprising:
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a source of image information in digital form; a transmitter coupled to said source for the transmission of digital image information; an image data sink for utilizing received digital image information; a receiver for receiving said digital image information and providing said received digital image information to said image data sink; a communications channel between said transmitter and said receiver for transmission of image data from said transmitter to said receiver; a feedback channel for providing quality information from said receiver to said transmitter, said information being indicative of quality of said received digital image information over said communication channel; whereby said transmitter is responsive to said quality information such that transmission parameters are varied at said transmitter to provide high quality image information at said receiver; and said feedback channel comprising; a channel status monitor; and a channel status estimator for instructing said channel status monitor to vary power level, baud rate, channel code rate, compression ratio and delivery rate of said transmitter for transmitting said digital image information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification