Circuit arrangement and method for processing a digital video stream and for detecting a fault in a digital video stream, digital video system and computer readable program product
First Claim
1. A circuit arrangement for processing a digital video stream and for detecting a fault in the processed digital video stream, the circuit arrangement comprising:
- an input interface for receiving an digital video stream, the digital video stream comprises information of a sequence of frames, the sequence of frames including first, second, and third frames;
a processing circuit which is arranged to process the digital video stream and to provide the processed digital video stream to an output interface; and
a hang-up detecting circuit for detecting a fault in the processed digital video stream, the hang-up detecting circuit comprising;
a checksum generating circuit which is arranged to generate a checksum for at least a part of each frame of the sequence including a first checksum for the first frame, a second checksum for the second frame, and a third checksum for the third frame,a memory to store a predefined amount of generated checksums including the first, second, and third checksums; and
an analyzing unit arranged to compare a currently generated checksum of a current frame of the sequence of frames of the processed digital video stream with a plurality of corresponding checksums of preceding frames stored in the memory including the first, second, and third checksums, and to generate an error signal if at least one predefined amount of compared checksums are matching.
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Abstract
The present invention relates to a circuit arrangement for processing a digital video stream, the circuit arrangement comprising: an input interface for receiving a digital video stream, a processing circuit which is arranged to process the digital video stream, a hang-up detecting circuit for detecting a fault in the processed digital video stream, the hang-up detecting circuit comprising: a checksum generating circuit which is arranged to generate checksums for the frames of the processed digital video stream, a memory for storing generated checksums and an analyzing device arranged to compare a currently generated checksum to a plurality of corresponding checksums of preceding frames stored in the memory and to generate an error signal if at least one predefined amount of compared checksums are matching. The present invention also relates to a digital video system, a method for processing a digital video stream and a computer readable program product.
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Citations
20 Claims
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1. A circuit arrangement for processing a digital video stream and for detecting a fault in the processed digital video stream, the circuit arrangement comprising:
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an input interface for receiving an digital video stream, the digital video stream comprises information of a sequence of frames, the sequence of frames including first, second, and third frames; a processing circuit which is arranged to process the digital video stream and to provide the processed digital video stream to an output interface; and a hang-up detecting circuit for detecting a fault in the processed digital video stream, the hang-up detecting circuit comprising; a checksum generating circuit which is arranged to generate a checksum for at least a part of each frame of the sequence including a first checksum for the first frame, a second checksum for the second frame, and a third checksum for the third frame, a memory to store a predefined amount of generated checksums including the first, second, and third checksums; and an analyzing unit arranged to compare a currently generated checksum of a current frame of the sequence of frames of the processed digital video stream with a plurality of corresponding checksums of preceding frames stored in the memory including the first, second, and third checksums, and to generate an error signal if at least one predefined amount of compared checksums are matching. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for processing a digital video stream and for detecting a fault in the processed digital video stream, the method comprising:
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processing a digital video stream wherein the digital video stream comprising information of an image; detecting a fault for each frame of a sequence of frames of the processed digital video stream, the sequence of frames including first, second, and third frames, detecting comprising; generating a checksum for at least a part of each frame of the sequence of frames the processed digital video stream, including a first checksum for the first frame, a second checksum for the second frame, and a third checksum for the second frame, storing a predefined amount of generated checksums including the first, second, and third checksums in a memory, comparing a currently generated checksum of a current frame of the sequence of frames of the processed digital video stream with a plurality of corresponding checksums of preceding frames of the same processed digital video stream stored in the memory including the first, second, and third checksums, generating an error signal if at least a predefined amount of compared checksums are matching. - View Dependent Claims (15, 16, 17, 18)
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19. A non-transitory computer readable medium comprising a memory device stores instructions which, when executed by a processor cause the processor to:
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process a digital video stream wherein the digital video stream comprising information of an image; detect a fault for each frame of a sequence of frames of the processed digital video stream, the sequence of frames including first, second, and third frames, detecting comprising; generate a checksum for at least a part of each frame of the sequence of frames the processed digital video stream, including a first checksum for the first frame, a second checksum for the second frame, and a third checksum for the second frame, store a predefined amount of generated checksums including the first, second, and third checksums in a memory, compare a currently generated checksum of a current frame of the sequence of frames of the processed digital video stream with a plurality of corresponding checksums of preceding frames of the same processed digital video stream stored in the memory including the first, second, and third checksums, generate an error signal if at least a predefined amount of compared checksums are matching. - View Dependent Claims (20)
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Specification