# US 2008/0187039 A1 · Method And Apparatus For Correcting Video Signal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0187039 A1 - Document ID: US20080187039A1 - Status: Published application - Kind: A1 - Application number: 11/814,813 - Filed: 2006-01-18 - Published: 2008-08-07 - Earliest claimed: 2005-01-28 - Assignees: Koninklijke Philips Electronics N.V. - Inventors: Daqing Zhang; Jiagang Zhang; Jin Wang - Web page: https://patentgrep.com/patent/US20080187039A1 ## CPC - H04N 19/44: Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder - H04N 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence) - H04N 19/61: in combination with predictive coding - H04N 19/895: in combination with error concealment - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract The present invention discloses a method of correcting a video signal that includes a video sequence parameter. The method comprises the steps of: obtaining a specific number of decoded values of the video sequence parameter; counting the times of occurrence of each different value of the decoded values; determining a correction value from the counting result; and correcting the decoded values of the video sequence parameter on the basis of the correction value. The present invention further discloses a correcting apparatus and a decoding apparatus of a video signal. With the present invention, it is able to find out conveniently a correction value of a video sequence parameter so as to correct the subsequent decoded values. ## Claims ### Claim 1 A method of correcting a video signal that includes a video sequence parameter, the method comprising the steps of: (a) obtaining a specific number of decoded values of the video sequence parameter; (b) counting the times of occurrence of each different value of the decoded values; (c) determining a correction value from the counting result; and (d) correcting the decoded values of the video sequence parameter on the basis of the correction value. ### Claim 2 (depends on 1) The method as claimed in claim 1, wherein the video sequence parameter includes at least one of the parameters: horizontal size of video picture, vertical size of video picture and frame rate of video picture. ### Claim 3 (depends on 1) The method as claimed in claim 1, wherein the specific number is determined according to the transmission error characteristics of the video signal. ### Claim 4 (depends on 1) The method as claimed in claim 1, wherein step (c) further comprises: (c1) comparing the times of occurrence of each of the decoded values so as to determine a decoded value, which has a time of occurrence not less than those of other decoded values, as the correction value. ### Claim 5 (depends on 1) The method as claimed in claim 1, wherein step (c) further comprises: (c2) if one of the decoded values has a time of occurrence larger than a predetermined threshold, determining this decoded value as the correction value. ### Claim 6 (depends on 5) The method as claimed in claim 5, wherein the threshold is determined according to the transmission error characteristics of the video signal. ### Claim 7 (depends on 1) The method as claimed in claim 1, wherein in step (a), the specific number decoded values are consecutive decoded values. ### Claim 8 A apparatus of correcting a video signal that includes a decoded video sequence parameter, comprising: obtaining means for obtaining a specific number of decoded values of the video sequence parameter; counting means for counting the times of occurrence of each different value of the decoded values; determining means for determining a correction value from the counting result; and a correction module for correcting the decoded values of the video sequence parameter on the basis of the correction value. ### Claim 9 (depends on 8) The apparatus as claimed in claim 8, wherein the video sequence parameter includes at least one of the parameters: horizontal size of video picture, vertical size of video picture and frame rate of video picture. ### Claim 10 (depends on 8) The apparatus as claimed in claim 8, wherein the specific number is determined according to the transmission error characteristics of the video signal. ### Claim 11 (depends on 8) The apparatus as claimed in claim 8, wherein the determining means further comprises: comparing means for comparing the times of occurrence of each of the decoded values so as to determine a decoded value, which has a time of occurrence not less than those of other decoded values, as the correction value. ### Claim 12 (depends on 8) The apparatus as claimed in claim 8, wherein the determining means further comprises: comparing means used for determining one of the decoded values as the correction value, if this decoded value has a time of occurrence larger than a predetermined threshold. ### Claim 13 (depends on 12) The apparatus as claimed in claim 12, wherein the threshold is determined according to the transmission error characteristics of the video signal. ### Claim 14 An apparatus of decoding a video signal that includes a decoded video sequence parameter, the decoding apparatus comprising: a decoding module for decoding the video signal; and a correcting apparatus, the correcting apparatus comprising: obtaining means for obtaining a specific number of decoded values of the video sequence parameter; counting means for counting the times of occurrence of each different value of the decoded values; determining means for determining a correction value from the counting result; and a correction module for correcting the decoded values of the video sequence parameter on the basis of the correction value. ### Claim 15 (depends on 14) The apparatus as claimed in claim 14, wherein the video sequence parameter includes at least one of the parameters: horizontal size of video picture, vertical size of video picture and frame rate of video picture. ### Claim 16 (depends on 14) The apparatus as claimed in claim 14, wherein the determining means further comprises: comparing means for comparing the times of occurrence of each the decoded values so as to determine a decoded value, which has a time of occurrence not less than those of other decoded values, as the correction value according to the counting result of the counting means. ### Claim 17 (depends on 14) The apparatus as claimed in claim 14, wherein the determining means further comprises: comparing means used for determining one of the decoded values as the correction value, if this decoded value has a time of occurrence larger than a predetermined threshold.