Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1993-06-25
1995-02-21
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Recording apparatus
360 381, 360 53, H04N 594
Patent
active
053921291
ABSTRACT:
A signal processing apparatus for use in a digital video signal reproducing apparatus for reproducing digital signal presented in sync blocks is disclosed. Each sync block has a fixed area for low frequency data and five subsequent sync blocks define a sharing group for sharing high frequency data. The signal processing apparatus includes an inner and outer correction circuit for correcting errors in the sync blocks. An error flag is provided to a sync block which still has an error remaining after the processing in the correction circuit. A memory is provided for storing errorless sync blocks of one frame. A substitution switch is provided for passing the errorless sync blocks, but substituting a sync block stored in the memory for a sync block still having some errors. Five sync blocks produced from the substitution switch are held in a delay. When no substitute sync block is detected in the five sync blocks in the delay, the data in the five sync blocks are decoded by a bit rate reduction decoder. But, when one to four substitute sync block is detected in the five sync blocks in the delay, only the low frequency data of the five sync blocks in the fixed area are decoded by the bit rate reduction decoder.
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Juri Tatsuro
Ohtaka Hideki
Chin Tommy P.
Matsushita Electric - Industrial Co., Ltd.
Tran Thai
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