Importance

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Abstract

Coded moving picture data is recorded in groups of frames, each frame representing a video image frame and each group being formed of intraframe, interframe and interpolated frame coded data signals. Typically, at least one interpolated frame coded data is derived, in part, from a video image frame that is represented in a preceding group of frames. If a recorded group of frames is edited, said at least one interpolated frame coded data in the edited group of frames no longer is related to the preceding group of frames on the record medium and, similarly, the interpolated frame coded data in the group of frames that immediately follows the edited group of frames no longer is related to the recorded group of frames which precedes it. Accordingly, an edit flag is set in the edited group of frames and/or in the immediately following group of frames to apprise decoding circuitry not to decode the said at least one interpolated frame coded data.

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First Claim