Closed caption signal processing apparatus and method

A method for receiving a television signal including a closed caption signal, comprising:

• receiving a television signal including a speech signal and a closed caption signal;
• subjecting speech information to speech recognition to derive speech contents including notation data, pronunciation data and various morpheme information, the speech recognition including estimating the pronunciation data, and estimating the speech contents with linguistic meaning based on the pronunciation information;
• detecting a speech timing of the speech contents;
• deriving closed caption contents from a closed caption signal associated with the speech signal;
• detecting a presentation timing of the closed caption contents;
• detecting agreement between the speech contents and the closed caption contents;
• calculating a time difference between the speech timing and the presentation timing that are detected on the speech contents and the closed caption contents that agree with each other, respectively.

A computer readable medium encoded with computer program instructions for receiving a television signal including a closed caption signal, which when executed by a computer results in performance of steps comprising:

• receiving a television signal including a speech signal and a closed caption signal;
• subjecting speech information in the speech signal to speech recognition to derive speech contents including notation data, pronunciation data and various morpheme information, the speech recognition including estimating the pronunciation data, and estimating the speech contents with linguistic meaning based on the pronunciation information;
• detecting a speech timing of the speech contents;
• acquiring closed caption contents from a closed caption signal associated with the speech signal;
• detecting a presentation timing of the closed caption contents;
• detecting agreement between the speech contents and the closed caption contents;
• calculating a time difference between the speech timing and the presentation timing that are detected on the speech contents and the closed caption contents that agree with each other, respectively.