Recording apparatus which adaptively records amounts of low resolution video inversely to amounts of high resolution video which has the same program content
AssigneeSharp Kabushiki Kaisha
InventorsHiroaki Nogami, Hironobu Katayama
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Abstract
A digital recording and reproducing apparatus records two kinds of digital signals of an identical video program, generated by high-efficiency coding, or a relatively high bit-rate signal and a relatively low bit-rate signal, onto approximately the same positions on the tape. When the low bit-rate signal is commonly used for normal playback and search-playback or when it is used only for the search-playback, the amount of the search-playback data is adjusted so that data on a number of frames to be a unit for edit work may be recorded onto an integer number of tracks.
Claims10
A digital recording and reproducing apparatus for recording and reproducing both high-resolution data for normal playback and low-resolution data, having a small amount of information compared with the high-resolution data, for special playback on a recording medium, utilizing different recording areas of the recording medium, the low-resolution data having a same program content as the high-resolution data, the digital recording and reproducing apparatus completely recording a group of data consisting of a limited number of frames on an integer number of adjacent recording tracks, the group of data including the low-resolution data which are formed with respect to the group of data, the digital recording and reproducing apparatus comprising:
- a controller for adaptively varying an amount of the low-resolution data, by enabling searching and editing with a group of mixed data as a unit so as to effectively record the high-resolution data and the low-resolution data on the integer number of adjacent recording tracks, by completely recording a mixed data group comprising the high-resolution data and the low-resolution data on the integer number of adjacent recording tracks, so that no unnecessary vacant position is formed on the integer number of adjacent recording tracks,
- wherein when an amount of the high-resolution data for normal playback is large, an amount of the low-resolution data for special playback is reduced by said controller in accordance with an increase in the high-resolution data, and when the amount of the high-resolution data is small, the amount of the low resolution data is increased by said controller in accordance with a decrease in the high-resolution data.
A digital recording and reproducing method for recording and reproducing both high-resolution data with a large amount of information for normal playback and low-resolution data with a small amount of information for special playback on a recording medium, utilizing different recording areas of the recording medium, the low-resolution data having a same program content as the high-resolution data, the digital recording and reproducing method completely recording a group of data consisting of a limited number of frames on an integer number of adjacent recording tracks, the group of data including the low-resolution data which are formed with respect to the group of data, the digital recording and reproducing method comprising the steps of:
- adaptively varying an amount of the low-resolution data, which has a same program content as the high-resolution data, in accordance with an amount of high-resolution data to be recorded;
- and
- completely recording a group of mixed data consisting of the high-resolution data and the low-resolution data on the integer number of adjacent recording tracks, to enable searching and editing with the group of mixed data as a unit.
Dependencies are inferred from the claim text.