Video disc data systems for interactive applications

Details Video disc data systems for interactive applications Video disc data systems for interactive applications

1983-12-05

1986-03-11

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358147, 369 43, 369 44, 369 47, 369 50, 369 59, G11B 700

Patent

active

045757704

ABSTRACT:
In a video disc mastering system, player control data is conveyed by a block code having framing and field number bits and data for use by a computer external to the player is conveyed by a convolutional code having no framing bits, having error check bits related to a subset of the field number bits conveyed by the player control data and having vertical parity selected to spread data required for predictive and reconstructive error correction over a number of video fields greater than that recorded on one convolution of the disc information track. Data is downloaded to an external computer for interactive player applications by means of a decoder which utilizes the player framing and field number codes conveyed by the player control data to recover the convolutionally encoded data as well as detecting tracking errors to provide a high data transfer rate, orders of magnitude of improvement in word error rates and facilitating new refinements in intrafield track error correction, namely, correction of intrafield track skips occuring after the player control data.

REFERENCES:
patent: 4307418 (1981-12-01), Mindel et al.
patent: 4308557 (1981-12-01), Dieterich
patent: 4309721 (1982-01-01), Christopher
patent: 4313134 (1982-01-01), Rustman et al.
patent: 4488278 (1984-12-01), Dieterich

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