Apparatus and method for reproducing information data of different formats from a multi-layer optical disc
AssigneeSony Corporation
InventorYoshimasa Utsumi
Life of this patent
Estimating the term…
Abstract
An apparatus for reproducing signals from a multi-layer disc with a first layer containing recorded high-quality digital audio data and a second layer containing recorded low-quality digital audio data. In this apparatus, the high-quality digital audio data and the low-quality digital audio data reproduced from the first and second layers respectively are once stored in a memory, and then the high-quality digital audio data and the low-quality digital audio data having the same content are reproduced alternately, from memory so that their tone qualities can be compared and evaluated distinctly.
Claims14
A disc reproducing apparatus for reproducing a disc which has one layer containing a recorded high-quality digital signal and another layer containing a recorded low-quality digital signal, said apparatus comprising:
- reproduction means for reproducing the high-quality digital signal from said one layer and the low-quality digital signal from said another layer;
- memory means for storing the high-quality digital signal and the low-quality digital signal obtained from said reproduction means;
- and
- memory control means for alternately reading and reproducing the high-quality digital signal and the low-quality digital signal stored in said memory means thereby causing a difference between the high-quality digital signal and the low-quality digital signal.
A method of reproducing a disc which has one layer containing a recorded high-quality digital signal and another layer containing a recorded low-quality digital signal, said method comprising the steps of:
- reproducing the high-quality digital signal from said one layer and the low-quality digital signal from said another layer;
- storing the reproduced high-quality digital signal and the reproduced low-quality digital signal in a memory;
- and
- controlling said memory to provide for the high-quality digital signal and the low-quality digital signal to be read out of said memory alternately thereby causing a difference between the high-quality digital signal and the low-quality digital signal.
Dependencies are inferred from the claim text.