Information carrier, device for encoding, method for encoding, device for decoding and method for decoding
AssigneeKoninklijke Philips Electronics N.V.
InventorsMarten E. Van Dijk, Willem M. J. M. Coene, Constant P. M. J. Baggen
Life of this patent
Estimating the term…
Abstract
The invention relates to an information carrier comprising runlength limited marks in a track. The runlengths of the marks represent main channel bits and variations of a further parameter of the marks representing secondary channel bits. Not all marks have said variations, only marks of at least a predetermined runlength have said variations. The invention further relates to a device for encoding, a method for encoding, a device for encoding and a method for decoding.
Claims13
An information carrier comprising runlength limited marks in a track, the runlengths of the marks representing main channel bits and variations of a further parameter of the marks representing secondary channel bits, characterized in that only marks of at least a predetermined runlength have said variations.
A device for encoding comprising converting means for converting a binary source signal into a channel signal, the channel signal comprising a main channel signal representing main channel bits and a secondary channel signal representing secondary channel bits, the converting means being further arranged for detecting the runlengths of the main channel bits and the converting means further comprising inserting means for generating the secondary channel signal only upon detecting a runlength of a predetermined minimum runlength.
A method for encoding comprising the step of converting a binary source signal into a channel signal, the channel signal comprising a main channel signal representing main channel bits and a secondary channel signal representing secondary channel bits, the method further comprising the step of detecting the runlengths of the main channel bits and the method further comprising the step of generating the secondary channel signal only upon detecting a runlength of a predetermined minimum runlength.
A device for decoding comprising decoding means for decoding a channel signal into a binary source signal, the channel signal comprising a main channel signal comprising main channel bits and a secondary channel signal comprising secondary channel bits, the device further comprising detecting means for detecting the runlengths of the main channel bits, the decoding means being further arranged for detecting the secondary channel only upon detecting a runlength of a predetermined minimum runlength.
A method for decoding comprising the step of decoding a channel signal into a binary source signal, the channel signal comprising a main channel signal comprising main channel bits and a secondary channel signal comprising secondary channel bits, the method further comprising the step of detecting the runlengths of the main channel bits and the method further comprising the step of detecting the secondary channel only upon detecting a runlength of a predetermined minimum runlength.
Dependencies are inferred from the claim text.