Video signal decoding arrangement and method for improved error concealment
First Claim
Patent Images
1. A video signal decoding arrangement for decoding a data stream into a series of images, the video signal decoding arrangement comprisinga data processing arrangement, configured and arranged to:
- decode the data stream into a plurality of sets of image data,identify a corrupted data segment in a current set of image data, andreplace the corrupted data segment with a replacement data segment generated as a function of a previous set of image data in response to an error detected in the data stream, wherein the data processor selectively stores the current set of image data in a first memory or a second memory based on a first pointer.
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Abstract
A video signal decoding arrangement conceals visible artifacts attributable to errors in a data stream. The arrangement includes a data processing arrangement that decodes the data stream into image data and that replaces data corrupted by the errors with replacement data generated as a function of a previous frame. The image data is optionally stored in first and second memories.
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Citations
39 Claims
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1. A video signal decoding arrangement for decoding a data stream into a series of images, the video signal decoding arrangement comprising
a data processing arrangement, configured and arranged to: -
decode the data stream into a plurality of sets of image data, identify a corrupted data segment in a current set of image data, and replace the corrupted data segment with a replacement data segment generated as a function of a previous set of image data in response to an error detected in the data stream, wherein the data processor selectively stores the current set of image data in a first memory or a second memory based on a first pointer. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A video signal decoding arrangement for decoding a data stream into a series of images, comprising:
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a data processing arrangement, configured and arranged to; decode the data stream into a plurality of sets of image data, identify a corrupted data segment in a current set of image data, and replace the corrupted data segment with a replacement data segment generated as a function of a previous set of image data in response to an error detected in the data stream; an error detecting arrangement, configured and arranged to detect the error in the data stream and to provide an indication of characteristics of the error to the data processing arrangement; and a prediction arrangement, responsive to the error detecting arrangement and configured and arranged to determine a likelihood that the error detecting arrangement triggered within a delimiting code.
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8. A video signal decoding arrangement for decoding a data stream comprising a series of sets of data containing delimiting codes into a series of images, the video signal decoding arrangement comprising:
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a video data processor, responsive to the data stream and to an error that affects the data stream such that a first set of data of the series of sets of data includes a corrupted data segment, the video data processor being configured and arranged to replace the corrupted data segment with a replacement data segment generated as a function of a second set of data of the series of sets of data; first and second frame buffers, responsive to the data processor and configured and arranged to store alternately each of the series of sets of data as an image in response to a first pointer; and a first-in-first-out buffer, configured and arranged to receive the data stream. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An artifact concealment method for concealing artifacts in decoded video signal data, the artifact concealment method comprising:
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detecting an error in a data stream including first and second sets of data representing images, the error affecting the second set of data such that the second set of data includes a corrupted data segment; replacing the corrupted data segment with a replacement data segment generated as a function of the first set of data, thereby generating a modified second set of data; storing the first and modified second sets of data as first and second images; and locating a delimiting code corresponding to a third set of data representing an image in the data stream. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. A video signal processing arrangement for decoding a data stream into a series of images, the video signal processing arrangement comprising:
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an error detecting arrangement configured and arranged to detect an error in the data stream and to output an indication of the error; a memory arranged to store a current image and a previous image; a video decoder adapted to respond to the data stream and to the previous image and to generate the current image from the data stream and from a prediction based on the previous image; and an error concealment arrangement, responsive to the indication output by the error detecting arrangement, adapted and configured to identify a corrupt segment of the current image and replace the corrupt segment with a replacement segment generated as a function of the previous image. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37)
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38. A video signal processing arrangement for decoding a data stream into a series of images, comprising:
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error detecting means for detecting an error in the data stream and to output an indication of the error; a memory arranged to store a current image and a previous image; video means, responsive to the data stream and to the previous image, for generating the current image from the data stream and from a prediction based on the previous image; and error concealment means, responsive to the indication output by the error detecting means for identifying a corrupt segment of the current image and replace the corrupt segment with a replacing segment generated as a function of the previous image.
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39. A video signal processing method for decoding a data stream into a series of images, comprising:
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detecting an error in the data stream and to output an indication of the error; storing a current image; storing a previous image; responsive to the data stream and to the previous image, generating the current image from the data stream and from a prediction based on the previous image; and responsive to the indication of the error, identifying a corrupt segment of the current image and replace the corrupt segment with a replacing segment generated as a function of the previous image.
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Specification