Transmission method and system for JPEG images
AssigneeLucent Technologies Inc.
InventorsVijitha Weerackody, Yong Zhou
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Abstract
The present invention is an improved transmission system for JPEG images. The present invention may include a separator for separating the JPEG image into Type-I and Type-II information and a transmitter for transmitting the Type-I and Type-II information over a wire or wireless communication medium to a receiver with unequal error protection, wherein the more error sensitive Type-I information is provided with more powerful error protection than the less sensitive Type-II information which makes up the bulk of the JPEG image. The present invention may further include a combiner for combining the Type-I and Type-II information received by the receiver in a JPEG format suitable for the data sink.
Claims42
An apparatus for transmitting a JPEG image over a communication medium to a receiver, comprising:
- a separator for separating the JPEG image into Type-I and Type-II information;
- and
- a transmitter for transmitting the Type-I information over the communication medium with more powerful error protection than the Type-II information.
An apparatus for receiving Type-I and Type-II information of a JPEG image transmitted over a communication medium with unequal error protection, comprising:
- a receiver adapted for processing the Type-I and Type-II information;
- and
- a combiner for combining the processed Type-I and Type-II information.
An apparatus for transmitting a JPEG image over a communication medium to a receiver, comprising:
- a separator for separating the JPEG image into Type-IA and Type-IB information;
- and
- a transmitter for transmitting the Type-IA information over the communication medium with more powerful error protection than the Type-IB information.
An apparatus for receiving Type-IA and Type-IB information of a JPEG image transmitted over a communication medium with unequal error protection, comprising:
- a receiver adapted for processing the Type-IA and Type-IB information;
- and
- a combiner for combining the processed Type-IA and Type-IB information.
A transmitter for transmitting a JPEG image over a communication medium to a receiver with unequal error protection, comprising:
- an error detection encoder for encoding Type-I information of the JPEG image with an error detection code;
- a modulator for modulating the error detection encoded Type-I information and for modulating Type-II information of the JPEG image for transmission over a forward channel of the communication medium to the receiver;
- and
- a repeat controller for re-transmitting the error detection encoded Type-I information in response to a retransmission request from the receiver transmitted over a feedback channel of the communication medium.
A transmitter for transmitting a JPEG image over a communication medium to a receiver with unequal error protection, comprising:
- an error correction encoder for encoding the Type-I information with an error correction code;
- and
- a modulator for modulating the error correction encoded Type-I information and for modulating Type-II information of the JPEG image for transmission over the communication medium to the receiver.
A receiver adapted for processing modulated, error detection encoded Type-I information and modulated Type-II information of a JPEG image transmitted over a forward channel of a communication medium with unequal error protection, comprising:
- a demodulator for demodulating the Type-I and Type-II information;
- an error detection decoder for decoding the demodulated Type-I information to determine if there are any errors in the Type-I information;
- and
- a repeat generator for sending a retransmission request to the transmitter over a feedback channel of the communication medium if errors are detected in the Type-I information.
A receiver adapted for processing modulated, error correction encoded Type-I information and modulated Type-II information of a JPEG image transmitted over a communication medium with unequal error protection, comprising:
- a demodulator for demodulating the Type-I and Type-II information;
- and
- an error correction decoder for decoding the demodulated Type-I information.
A method of transmitting a JPEG image over a communication medium to a receiver with unequal error protection, comprising:
- separating the JPEG image into Type-I and Type-II information;
- and
- transmitting the Type-I information over the communication medium to the receiver with more powerful error protection than the Type-II information.
A method of receiving Type-I and Type-II information of a JPEG image transmitted over a communication medium with unequal error protection, comprising:
- receiving the Type-I and Type-II information from the communication medium;
- processing the Type-I and Type-II information;
- and
- combining the processed Type-I and Type-II information.
A method of transmitting a JPEG image over a communication medium to a receiver, comprising:
- separating the JPEG image into Type-IA and Type-IB information;
- and
- transmitting the Type-IA information over the communication medium to the receiver with more powerful error protection than the Type-IB information.
A method of receiving Type-IA and Type-IB information of a JPEG image transmitted over a communication medium with unequal error protection, comprising:
- receiving the Type-IA and Type-IB information from the communication medium;
- processing the Type-IA and Type-IB information;
- and
- combining the processed Type-IA and Type-IB information.
A method of transmitting a JPEG image over a communication medium to a receiver with unequal error protection, comprising:
- encoding Type-I information of the JPEG image with an error detection code;
- modulating the error detection encoded Type-I information for transmission over a forward channel of the communication medium to the receiver;
- modulating Type-II information of the JPEG image for transmission over the forward channel of the communication medium to the receiver;
- and
- re-transmitting the error detection encoded Type-I information in response to a retransmission request from the receiver transmitted over a feedback channel of the communication medium.
A method of transmitting a JPEG image over a communication medium to a receiver with unequal error protection, comprising:
- encoding Type-I information of the JPEG image with an error correction code;
- modulating the error correction encoded Type-I information for transmission over the communication medium to the receiver;
- and
- modulating Type-II information of the JPEG image for transmission over the communication medium to the receiver.
A method of receiving modulated, error detection encoded Type-I information and modulated Type-II information of a JPEG image transmitted over a forward channel of a communication medium with unequal error protection, comprising:
- demodulating the Type-I and Type-II information;
- decoding the error detection code of the demodulated Type-I information to determine if there are any errors in the Type-I information;
- and
- sending a retransmission request to the transmitter over a feedback channel of the communication medium if errors are detected in the Type-I information.
A method of receiving processing modulated, error correction encoded Type-I information and modulated Type-II information transmitted over a communication medium with unequal error protection, comprising:
- demodulating the Type-I and Type-II information;
- and
- decoding the demodulated Type-I information.
An apparatus for detecting the occurrence of Type-I information in Type-II information of a JPEG image, comprising:
- a processor for detecting hexadecimal ff bytes in the Type-II information and for replacing at least one f of each detected ff byte with a random bit pattern.
A method of detecting the occurrence of Type-I information in Type-II information of a JPEG image, comprising:
- detecting hexadecimal ff bytes in the Type-II information;
- and
- replacing at least one f of each detected ff byte with a random bit pattern .
Dependencies are inferred from the claim text.