Title:
【発明の名称】基本音声記憶装置の編集能力を備えた映画デジタル音声システム及び方法
Document Type and Number:
Japanese Patent JPH0772784
Kind Code:
B2
Abstract:
A digital sound system for motion picture films employs a digital time code on the film to trigger the transfer of sound data from a digital audio store to a FIFO memory. The digital audio data is read out from the FIFO memory and played back in the theater at a constant rate, with any jumps in the digital time code handled by making a corresponding jump within the digital audio store but not in the FIFO memory. Readout from the FIFO memory and clocking of the digital-to-analog converters (DACs) used for theater playback is synchronized to the AC mains that powers the theater projector, and thus allows for an uninterrupted audio playback even if time code entries on the film are obliterated. The FIFO memory need only have enough capacity to accommodate the maximum audio store access time, and can be quite small.
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Inventors:
Beard, Terry Dee
Delaria, Joseph
Ketchum, James S
Delaria, Joseph
Ketchum, James S
Application Number:
JP50644694A
Publication Date:
August 02, 1995
Filing Date:
August 02, 1993
Export Citation:
Assignee:
Digital Theater Systems Limited Partnership
International Classes:
G03B31/00; G03B31/02; G11B7/003; G11B20/00; G11B20/10; G11B27/031; G11B27/10; G11B27/32; (IPC1-7): G03B31/00; G03B31/02
Domestic Patent References:
| JP2254436A |
Other References:
【文献】米国特許4040026(US,A)
【文献】米国特許4860193(US,A)
【文献】国際公開91/05335(WO,A)
【文献】国際公開90/14614(WO,A)
【文献】米国特許4860193(US,A)
【文献】国際公開91/05335(WO,A)
【文献】国際公開90/14614(WO,A)
Attorney, Agent or Firm:
Kyozo Yuasa (6 people outside)