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US 4,903,148 AGranted
Digital signal editing apparatus
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYoshinori Amano, Shiro Tsuji, Hiroshi Matsushima
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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYoshinori Amano, Shiro Tsuji, Hiroshi Matsushima
Estimating the term…
A novel digital signal recording and reproducing apparatus is disclosed in which an audio digital signal is recorded and reproduced alone or together with a video signal in a video tape recorder. If the sampling frequency of the audio signal is not an integral multiple of the vertical synchronous signal of the video signal, the audio signal is divided among fields in accordance with a predetermined regularity, and then the field information for identifying the number of samples of the audio digital signal is added and recorded for each field. At the time of reproduction, the field information is read to identify the number of samples of the audio digital signal, thus picking out only the audio signal excepting the redundant portions. In adding or inserting a signal of tape 2 to tape 1, the reproduced signal of tape 2 is divided and recorded again among the fields on the basis of the field information obtained from the reproduced signal of tape 1 in such a manner as to satisfy the regularity with which the audio signal already recorded in tape 1 is divided among the fields.
A digital signal apparatus for editing video tapes on which, when a sampling frequency of an audio signal is different from an integral multiple of a field frequency of a video signal, an audio digital signal is divided into fields each containing a number of sampling units of the audio digital signal, and information for identifying the number of sampling units of the audio digital signal as well as the audio digital signal contained in the sampling units are recorded in each field, said apparatus comprising:
Dependencies are inferred from the claim text.