Appeal No. 96-2696
Application 08/167,415
Claims 13-15, 17-19, 21, and 23 stand rejected under
§ 102(e) as anticipated by Acampora.
The rejections based on Sun
Sun, which discloses an error concealment method for HDTV
receivers, explains in the "Background of the Invention"
section:
The Advanced Television Research Consortium (ATRC)
in the United States has developed an HDTV system based
upon the MPEG format, for transmission of high definition
television (HDTV) signals in digital form. This HDTV
System is described in U.S. Pat. No. 5,122,875. In the
HDTV system developed by the ATRC, video signal
compressed according to an MPEG like format is arranged
in service type specific transport packets for
transmission. These packets undergo a first level of
error encoding, to generate a frame check sequence FCS,
e.g., a cyclic redundancy check, and FCS error check
codes are appended to the transport packets. Thereafter
the transport packets, with the appended error check
codes, undergo a forward error coding, FEC, such as a
Reed-Solomon coding, and FEC error detection/correction
codes are appended to the data.
At the receiver, transmitted information is detected
and applied to an FEC decoder, which performs a limited
error correction function on the transmitted data. The
FEC corrects the majority of errors incurred during
transmission[;] however because the error check overhead
volume is limited by bandwidth constraints, some errors
will pass the FEC decoder without detection/correction.
The FEC decoded signal is then coupled to an FCS decoder.
The FCS decoder is capable of detecting but not
correcting data. If an error is detected in a transport
packet, the entire transport packet is discarded.
The discarded transport packets may thereafter be
replaced with synthesized compressed data. An example of
apparatus for performing pre-decompression error
concealment is described in copending application Ser.
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