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US 6,556,714 B2Granted
Signal processing apparatus and method
AssigneeSony Corporation
InventorMotoki Kato
Life of this patent
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Abstract
A signal processor comprises a decoder 1 which decodes a bit stream S10 to provide an image signal S1 and a coding parameter S8, a switch SW1 to select a destination to which the image signal S1 from the decoder 1 is to be sent, a post-processing circuit 2 which post-processes the image signal from a selectable terminal B of the switch SW1 to provide an image signal S2, a pre-processing circuit 3 to preprocess an image signal S4, a switch SW2 to select either the image signal from the pre-processing circuit 3 or an image signal S3 from the switch SW1, and an encoder 4 which codes an image signal S5 and coding parameter to provide a bit stream.
Claims9
A signal processing apparatus, comprising:
- switch means having a first switch and a second switch, in which a first output terminal of said first switch is coupled to a first input terminal of said second switch;
- means for decoding a bit stream coded from an image signal to obtain a decoded image signal and supplying the same to an input terminal of said first switch;
- means, coupled to a second output terminal of said first switch, for receiving the decoded image signal supplied from the decoding means and for post-processing the same in a predetermined manner;
- means for coding an image signal, in which the coding means is coupled to an output terminal of said second switch;
- and
- means for pre-processing an input image signal in a predetermined manner and supplying the pre-processed image signal to a second input terminal of said second switch;
- whereby said first and second switches are controlled so as to supply the decoded image signal provided from the decoding means to the coding means without being supplied to the pre-processing means and post processing means when re-coding the decoded image signal.
4 more elements
A signal processing apparatus, comprising:
- switch means having a first switch and a second switch;
- means for decoding a bit stream coded from an image signal to obtain a decoded image signal and supplying the same to an input terminal of said first switch;
- means, coupled to a first output terminal of said first switch, for receiving the decoded image signal supplied from the decoding means and for post-processing the same in a predetermined manner;
- means for coding an image signal, in which the coding means is coupled to an output terminal of said second switch;
- means for pre-processing an input image signal in a predetermined manner and supplying the pre-processed image signal to a first input terminal of said second switch;
- converting means, coupled to a second output terminal of said first switch, for receiving the decoded image signal supplied from the decoding means and for inserting a dummy signal into the received decoded image signal to convert the received decoded image signal to a predetermined signal format;
- and
- inverse converting means for removing the dummy signal from the image signal provided from the converting means to restore the image signal to the original signal format and for supplying the same to a second input terminal of said second switch;
- whereby said first and second switches are controlled so as to supply the decoded image signal provided from the decoding means to the coding means via the converting means and inverse converting means without being supplied to the pre-processing means and post-processing means when re-coding the decoded image signal.
6 more elements
A signal processing method, comprising the steps of:
- decoding a bit stream coded from an image signal to obtain a decoded image signal by use of a decoding means and supplying the same to an input terminal of a first switch;
- receiving the decoded image signal supplied from the decoding means by way of a first output terminal of said first switch and post-processing the same in a predetermined manner by use of a post-processing means;
- coding an image signal by use of a coding means which is coupled to an output terminal of said second switch;
- pre-processing an input image signal in a predetermined manner by use of a pre-processing means and supplying the pre-processed image signal to a first input terminal of a second switch;
- receiving the decoded image signal supplied from the decoding means by way of a second output terminal of said first switch and inserting a dummy signal into the received decoded image signal to convert the received decoded image signal to a predetermined signal format by use of a converting means;
- and
- removing the dummy signal from the image signal provided from the converting means to restore the image signal to the original signal format by use of an inverse converting means and supplying the same to a second input terminal of said second switch;
- whereby said first and second switches are controlled so as to supply the decoded image signal provided from the decoding means to the coding means via the converting means and inverse converting means without being supplied to the pre-processing means and post-processing means when re-coding the decoded image signal.
5 more elements
Dependencies are inferred from the claim text.