Pseudo multi-channel play-back apparatus

Details Pseudo multi-channel play-back apparatus Pseudo multi-channel play-back apparatus

2005-12-12

2008-08-05

Edun, Muhammad N. (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Control of information signal processing channel

C369S047190, C369S047240, C369S087000, C369S124040

Reexamination Certificate

active

07408851

ABSTRACT:
Compressed audio data for 5.1 channels stored in the DVD-ROM11A is read by the AC-3 decoder12of a pseudo multi-channel stereo play-back apparatus and, after expansion, stored temporarily in a buffer13, channel by channel. Among stored audio data stored in the buffer13, audio data for left and right channels and for a front center channel are then subjected to the phase transformation. Audio data for left and right front channels are mixed with the phase transformed audio data by first and second mixing circuits21and22and mixed audio data are converted into analog audio signals by first and second D/A converters. The apparatus is capable of pseudo reproduction of the multi-channel audio signals stored in a recording medium such as a DVD-ROM by two channel play-back with an excellent sound effect which is not obtainable by usual two-channel play-back systems.

REFERENCES:
patent: 5587978 (1996-12-01), Endo et al.
patent: 5635930 (1997-06-01), Oikawa
patent: 5870480 (1999-02-01), Griesinger
patent: 2-261213 (1990-10-01), None
patent: 9-259539 (1997-10-01), None

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