Synchronizing device with head word position verification

Details Synchronizing device with head word position verification Synchronizing device with head word position verification

1997-11-04

2000-04-04

Nguyen, Chau

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

375368, H04J 307

Patent

active

060470046

ABSTRACT:
From an input data signal (Data.sub.-- In) formed of a data signal complied with the MPEG standard including unit packets each formed of a sequence of 204 pieces of 8-bit-long unit data assigned in a sequence of 6-bit-long unit data, the original packet-unit data signal is reconfigured. Data having a length of 8 bits are sequentially extracted from two 6-bit-long unit data successively held in buffers (BS1, BS2). Correctness of the position of the head word of the packet is verified on the basis of whether a synchronizing code (Cd) indicating the head word repeatedly appears in the cycles of packets. It is determined whether a cycle of a packet has passed on the basis of a value counted in synchronization with an extraction signal (Dout), eliminating the necessity for the FIFO required in conventional devices. As a result, size reduction and cost reduction of the device are implemented.

REFERENCES:
patent: 5490147 (1996-02-01), Kubo
patent: 5557614 (1996-09-01), Sandler et al.
patent: 5671227 (1997-09-01), Keller et al.

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