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US 7,127,157 B1Granted
Recording and reproducing apparatus
AssigneeSharp Kabushiki Kaisha
InventorsShuji Saito, Takaaki Kato, Eiichi Takakura
Life of this patent
Estimating the term…
Abstract
When the length of the vertical synchronizing signal constantly differs from that of the standard signal, writing of data into the shuffling memory and readout of data therefrom are asynchronous so that overwriting and mixture of data will occur. To deal with this a memory for three frames is used for the shuffling memory. This makes it possible to effect shuffling without causing data mixture.
Claims8
A recording and reproducing apparatus for recording and reproducing digital video signals, comprising:
- a memory for at least three frames;
- a writing means for writing externally input video data into the memory based on the synchronizing signal of the digital video signal;
- a first readout means for reading video data from the memory based on the synchronizing signal;
- a second readout means for reading video data from the memory based on a free-running synchronizing signal generated separately;
- and
- a page management moans for performing management of frame pages in the memory by at least controlling the timing of writing video data into the memory and the timing of readout, based on the synchronizing signal,
- wherein the first readout means and second readout means are switched over from one to another in accordance with the instruction from the page management means.
4 more elements
Dependencies are inferred from the claim text.