Optical recording medium, recording method and apparatus for optical recording medium and reproducing method and apparatus
AssigneeSony Corporation
InventorYoichiro Sako
Life of this patent
Estimating the term…
Abstract
An optical recording medium having a track including plural pits formed based on first data and lands defined between neighboring pits, these pits are deformed as they are recorded based on second data. The first and second data are synthesized and reproduced to realize audio reproduction with a broad frequency range. The first data are adapted to be reproducible by a customary disc reproduction device. The reproduction of the first data is controlled by the second data to protect recorded data.
Claims26
A reproducing apparatus for an optical recording medium, comprising:
- an optical pickup for reading out first and second data from an optical recording medium including a track having a plurality of pits formed based on said first data recorded therein and lands defined between neighboring pits, said plurality of pits being deformed based on said second data;
- a first demodulator for demodulating said first data of said optical recording medium based on an output signal from said optical pickup;
- and
- a second demodulator for demodulating said second data of said optical recording medium based on said output signal from said optical pickup.
A reproducing apparatus for an optical recording medium, comprising:
- an optical pickup for reading out first and second data and discriminating data from an optical recording medium including a track having a plurality of pits formed based on said first data recorded therein and lands defined between neighboring pits, said plurality of pits being deformed based on said second data, said optical recording medium also having said discriminating data recorded thereon;
- a first demodulator for demodulating said first data from said optical recording medium based on an output signal of said optical pickup;
- a second demodulator for demodulating said second data of said optical recording medium based on said output signal from said optical pickup;
- and
- a controller for controlling operation of said second demodulator based on said discriminating data read out by said optical pickup from said optical recording medium.
A method for reproducing an optical recording medium comprising the steps of:
- reading out first and second data from an optical recording medium including a track having a plurality of pits formed based on said first data recorded therein and lands defined between neighboring pits, said pits being deformed based on said second data;
- demodulating said first data of said optical recording medium based on an output signal of data read out from said optical recording medium in said step of reading;
- and
- demodulating said second data based on said output signal of data read out from said optical recording medium.
A reproducing method for an optical recording medium comprising the steps of:
- demodulating first data based on playback signals of data read out from an optical recording medium including a track made up of a plurality of pits formed based on said first data recorded and lands defined between neighboring pits, said plural bits being deformed based on second data, said optical recording medium having discrimination data recorded thereon;
- and
- demodulating said second data based on said playback signals of data read out from said optical recording medium based on results of of discriminating said discrimination data read out from said optical recording medium.
Dependencies are inferred from the claim text.