Granted Patent B2

US 7,231,587 · App. 10/812,286 · Granted Jun 12, 2007

Abstract

Claims (62)

1. A method for processing an input signal, comprising the steps of:

(A) extracting a compressed signal and a first checksum from said input signal;

(B) generating a decompressed signal by decompressing said compressed signal;

(C) calculating a second checksum for said decompressed signal; and

(D) generating a result by comparing said first checksum to said second checksum, wherein said second checksum comprises a plurality of checksums, one each for at least a luminance channel, a first chrominance channel and a second chrominance channel of said decompressed signal.

2. The method according to claim 1 , wherein step (C) comprises the sub-step of:

calculating said second checksum for a sub-picture of video in said decompressed signal.

3. The method according to claim 1 , wherein step (C) comprises the sub-step of:

calculating said second checksum for a macroblock of video in said decompressed signal.

4. The method according to claim 1 wherein said decompressed signal comprises an audio signal.

5. The method according to claim 1 , wherein said input signal is compliant with at least one of an International Organization for Standardization/International Electrotechnical Commission 14496-10 standard and an International Telecommunication Union-Telecommunications Standardization Sector Recommendation H. 264 accounting for said first checksum.

6. A method for processing an input signal, comprising the steps of:

(A) extracting a compressed signal and a first checksum from said input signal;

(B) generating a decompressed signal by decompressing said compressed signal;

(C) calculating a second checksum for said decompressed signal;

(D) generating a result by comparing said first checksum to said second checksum;

(E) extracting a quality value from said input signal, (i) said quality value indicating a correlation between an original signal and a reconstructed signal and (ii) said reconstructed signal being generated by decompressing said compressed signal; and

(F) transferring said decompressed signal, said quality value and said result to a user.

7. The method according to claim 6 , wherein (i) said input signal comprises a digital video bitstream in an encoded form, (ii) said quality value comprises a peak signal-to-noise ratio, (iii) said first checksum comprises a cyclic redundancy check and (iv) said result indicates one of a match and a non-match between said first checksum and said second checksum.

8. The method according to claim 6 , wherein said second checksum comprises a plurality of checksums, one each for at least a luminance channel, a first chrominance channel and a second chrominance channel of said decompressed signal.

9. A method for processing an input signal, comprising the steps of:

(A) extracting a compressed signal and a first checksum from said input signal;

(B) generating a decompressed signal by decompressing said compressed signal;

(C) calculating a second checksum for said decompressed signal by summing each absolute difference of two consecutive data samples over a predetermined number of said consecutive data samples within said decompressed signal; and

(D) generating a result by comparing said first checksum to said second checksum.

10. A method for processing an input signal, comprising the steps of:

(A) extracting a compressed signal and a quality value from said input signal, (i) said quality value indicating a correlation between an original signal and a reconstructed signal and (ii) said reconstructed signal being generated by decompressing said compressed signal;

(B) generating a decompressed signal by decompressing said compressed signal; and

(C) transferring said decompressed signal and said quality value to a user.

11. The method according to claim 10 , wherein said quality value comprises a signal-to-noise ratio having a noise component based on a difference between said original signal and said reconstructed signal.

12. The method according to claim 10 , wherein said quality value comprises a sum of absolute differences between said original signal and said reconstructed signal.

13. The method according to claim 10 , wherein said quality value comprises a plurality of values, one each for at least a luminance channel, a first chrominance channel and a second chrominance channel of said original signal.

14. The method according to claim 10 , wherein said input signal is compliant with at least one of an International Organization for Standardization/International Electrotechnical Commission 14496-10 standard and an International Telecommunication Union-Telecommunications Standardization Sector Recommendation H. 264 accounting for said quality value.

15. The method according to claim 10 , further comprising the steps of:

extracting a first checksum from said input signal;

calculating a second checksum for said decompressed signal;

generating a result by comparing said first checksum to said second checksum; and

transferring said result to said user.

16. The method according to claim 15 , wherein (i) said input signal comprises a digital video bitstream in an encoded form, (ii) said quality value is a peak signal-to-noise ratio, (iii) said first checksum comprises a cyclic redundancy check and (iv) said result indicates one of a match and a non-match between said first checksum and said second checksum.

17. A method for processing an original signal, comprising the steps of:

(A) generating a compressed signal, by compressing said original signal;

(B) generating a reconstructed signal by decompressing said compressed signal;

(C) calculating at least one of (i) a first checksum for said reconstructed signal and (ii) a quality value indicating a correlation between said original signal and said reconstructed signal;

(D) generating an output signal comprising said compressed signal and said at least one of said first checksum and said quality value; and

(E) transferring said quality value to a user.

18. A method for processing an original signal, comprising the steps of:

(A) generating a compressed signal by compressing said original signal;

(B) generating a reconstructed signal by decompressing said compressed signal;

(C) calculating at least one of (i) a first checksum for said reconstructed signal and (ii) a quality value indicating a correlation between said original signal and said reconstructed signal; and

(D) generating an output signal comprising said compressed signal and said at least one of said first checksum and said quality value, wherein said first checksum comprises a plurality of checksums, one each for at least a luminance channel, a first chrominance channel and a second chrominance channel of said original signal.

19. The method according to claim 17 , wherein said first checksum covers a sub-picture of video in said reconstructed signal.

20. The method according to claim 17 , wherein said first checksum covers a macroblock of video, in said reconstructed signal.

21. The method according to claim 17 , wherein (i) said original signal comprises a video signal, (ii) said quality value comprises a peak signal-to-noise ratio and (iii) said first checksum comprises a cyclic redundancy check.

22. The method according to claim 17 , wherein said original signal comprises an audio signal.

23. The method according to claim 17 , wherein said output signal is compliant with at least one of an International Organization for Standardization/International Electrotechnical Commission 14496-10 standard and an International Telecommunication Union-Telecommunications Standardization Sector Recommendation H. 264 accounting for said quality value and said first checksum.

24. A method for processing an original signal, comprising the steps of:

(A) generating a compressed signal by compressing said original signal;

(B) generating a reconstructed signal by decompressing said compressed signal;

(C) calculating at least one of (i) a first checksum for said reconstructed signal and (ii) a quality value indicating a correlation between said original signal and said reconstructed signal, wherein said first checksum is calculated by summing each absolute difference of two consecutive data samples over a predetermined number of said consecutive data samples within said reconstructed signal; and

(D) generating an output signal comprising said compressed signal and said at least one of said first checksum and said quality value.

25. The method according to claim 24 , further comprising the step of:

transferring said quality value to a user.

Assignments (9)