Frame synchronizer, optical disk device, information recording/reproducing apparatus, and signal synchronizing method
First Claim
1. A frame synchronizer receiving a video signal having a first synchronization signal and frame data on a frame basis, the frame synchronizer comprising:
- a memory;
a synchronization signal generator for generating a second synchronization signal having a frequency different from the first synchronization signal and higher than a predetermined standard frequency; and
a controller for writing the frame data to the memory on the frame basis in accordance with the first synchronization signal, and reading the frame data from the memory on the frame basis in accordance with the second synchronization signal to output the frame data.
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Accused Products
Abstract
To provide a frame synchronizer free of any loss of additional information added to frame data of an input video signal. An embodiment of the invention relates to a frame synchronizer for receiving a video signal having a first synchronization signal and frame data on a frame basis, writing the frame data to a memory on the frame basis in accordance with the first synchronization signal, and reading the frame data from the memory on the frame basis in accordance with a second synchronization signal of a frequency different from a frequency of the first synchronization signal to output the frame data, including: a synchronization signal generator generating the second synchronization signal having the frequency higher than a preset standard frequency. With such a configuration, it is possible to prevent the loss of the additional information added to the frame data in the input video data.
30 Citations
19 Claims
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1. A frame synchronizer receiving a video signal having a first synchronization signal and frame data on a frame basis, the frame synchronizer comprising:
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a memory;
a synchronization signal generator for generating a second synchronization signal having a frequency different from the first synchronization signal and higher than a predetermined standard frequency; and
a controller for writing the frame data to the memory on the frame basis in accordance with the first synchronization signal, and reading the frame data from the memory on the frame basis in accordance with the second synchronization signal to output the frame data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A signal synchronizing method, comprising:
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receiving a video signal having a first synchronization signal and frame data on a frame basis;
writing the frame data to a memory on the frame basis in accordance with the first synchronization signal; and
reading the frame data from the memory in accordance with a second synchronization signal of a frequency different from a frequency of the first synchronization signal on the frame basis to output the read frame data, the second synchronization signal being generated to have the frequency higher than a preset standard frequency. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification