05583650 is referenced by 17 patents and cites 58 patents.

Methods of operating a digital video recording and playback device, such as a video tape recorder, to arrange trick play data into one or more groups, to generate error correction bits for each group of trick play data, e.g., a group of trick play data blocks, and to correct the data after being read back using the error correction bits is disclosed. The trick play data blocks are made to be smaller than normal play data blocks with multiple trick play data blocks being equal in size to a single normal play data block. By making a group of trick play data blocks equal in size to a single normal play data block, the group of trick play data blocks may be processed as a unit by the same error correction circuitry and in the same manner used to process individual normal play data blocks. In accordance with one embodiment, the error correction bits for a group of trick play data blocks are calculated treating the data in the group of trick play data blocks as a single unit. The error correction bits are appended to the last data block in the group of trick play data blocks. During trick play operation the trick play data blocks are read back and combined according to trick play data groups. Each group of trick play blocks is then processed using the same error correction circuitry used to process a normal play data block.

Title
Digital recording and playback device error correction methods and apparatus for use with trick play data
Application Number
109236
Publication Number
5583650
Application Date
June 5, 1995
Publication Date
December 10, 1996
Inventor
Michael A Plotnick
Southampton
PA, US
Masuo Oku
Kamakura
JP
Hiroo Okamoto
Yokohama
JP
Takaharu Noguchi
Yokohama
JP
Masafumi Nakamura
Yokohama
JP
Katsuo Mohri
Kanagawa
JP
John G N Henderson
Princeton
NJ, US
Jack S Fuhrer
Princeton Junction
NJ, US
Jill M Boyce
Manalapan
NJ, US
Frank A Lane
Medford Lakes
NJ, US
Agent
Peter L Michaelson & Wallace Michaelson
Michael P Straub
Assignee
Hitachi
JP
Hitachi America
NY, US
IPC
H04N 5/78
H04N 5/76
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