Optical disk player having multidomain memory for storing demodu

Details Optical disk player having multidomain memory for storing demodu Optical disk player having multidomain memory for storing demodu

1997-06-25

2000-06-06

Dinh, Tan

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

386126, G11B 1722

Patent

active

060727551

ABSTRACT:
A device for controlling a multidomain memory of an optical disk player which performs demodulation, error correction and descrambling for information data reproduced from an optical disk, and transmits data descrambled to an audio/video decoder or ROM decoder. The device for controlling the multidomain memory includes a memory for reading or writing data modulated, error-corrected or descrambled by the disk player, the memory including a plurality of units each of which has a characteristic number; a demodulation address generator for counting a clock which latches the demodulated data; an error correction address generator for generating an address signal for reading data to be error-corrected from the memory; a descramble address generator for generating an address signal for storing the descrambled data into the memory; a record/reproduction controller for generating signals required for accessing the memory in order to record or reproduce data; a data output address generator for generating an address signal for reading data to be transmitted from the memory when a data transmission request signal is received from the audio/video decoder or the ROM decoder; and a memory state controller for judging whether a memory state is in overflow, underflow or empty by comparing the addresses generated from the address generators with a predetermined critical value, so as to command the record/reproduction controller not to record any more, or to generate a signal indicating the memory state.

REFERENCES:
patent: 4603413 (1986-07-01), Sinjou et al.
patent: 5734787 (1998-03-01), Yonemitsu et al.
patent: 5734788 (1998-03-01), Nonomura et al.
patent: 5771331 (1998-06-01), Aoki et al.
patent: 5917792 (1999-06-01), Shigenobu et al.

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