Patent ID: 7664375

Claim:
An information signal editing device for editing an information signal that includes a first information file consisted of plural signals with different size of capacities, which signals are independent and relevant from/to each other, and a first management information file for managing the first information file, the information signal editing device comprising: a recording means for recording either the first information file or the first management information file into a memory; and a management information file storage means for storing a second management information file for managing either the first information file included in the information signal or the first information file recorded in the memory by the recording means, into the memory according to a predetermined instruction, wherein the first information file and the second information file recorded in the memory are MPEG stream data constituted by audio data and video data, and the editing device includes: a separation means for separating the audio packet data and the video packet data from the MPEG stream data; a time information obtaining means for obtaining PTS information which is time information from the output data from the separation means, and calculating time difference between the video packet data and the audio packet data from the PTS information; an audio decoding means for decoding the audio packet data separated by the separation means; a time matching means for performing time matching by deleting part of the output data from the audio decoding means on the basis of the time difference calculated by the time information obtaining means; an audio encoding means for compressing the output data from the time matching means in a prescribed format to generate audio packet data; and a multiplexing means for multiplexing the video packet data separated by the separation means and the audio packet data generated by the audio encoding means; wherein the recording means records the output from the multiplexing means into the memory.