Video player/recorder with non-linear mark length modulation

Details Video player/recorder with non-linear mark length modulation Video player/recorder with non-linear mark length modulation

1978-12-28

1980-09-09

Konick, Bernard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

360 24, 360 32, 360 38, 360 40, 371 2, H04N 576

Patent

active

042220726

ABSTRACT:
In a video disk system a mark along a record data track is modulated in length to represent multi-bit binary code blocks of a first length (such as three or fout bits) and the player system associated with the disk operates in multi-bit code blocks that are generally longer (for example eight bits) so that two marks on the disk may represent a single code block in the associated system. The bits of the code block in the associated system are assigned to bit positions of the appropriate number of marks on the disk in a way that minimizes the effect of errors in the operation of initially writing or subsequently reading a mark. The increments of mark length are also made non-linear to further minimize the effect in the associated system of errors in mark length.

REFERENCES:
patent: 4022986 (1977-05-01), Teer et al.
patent: 4146099 (1979-03-01), Matsushima et al.
patent: 4161753 (1979-07-01), Bailey et al.

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