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Class Information
Number: 369/86
Name: Dynamic information storage or retrieval > Storage or retrieval of spatially related acoustic signals (e.g., stereo)
Description: Subject matter in which the signal to be stored is responsive to, or the retrieved signal produces, plural audible vibrations which have a common time base and a spatial relationship to produce the effect of position or depth.

Sub-classes under this class:

Class Number Class Name Patents
369/91 Having distinct electrical channels 10
369/92 Including distinct storage tracks on record medium 14
369/89 Quadraphonic 38
369/87 Simulated spatial effect (e.g., pseudo-stereo) 14
369/88 With transformation or intentional distortion of information signal (e.g., preemphasis) 25

Patents under this class:

Patent Number Title Of Patent Date Issued
8392169 Simulating virtual optical disc recorder by using a storage device and method for the same Mar. 5, 2013
8139721 Telephonic repeat method Mar. 20, 2012
7668576 Incorporating a portable digital music player into a vehicle audio system Feb. 23, 2010
7542815 Extraction of left/center/right information from two-channel stereo sources Jun. 2, 2009
7221625 Multi-channel acoustic apparatus with DVD reproduction function May. 22, 2007
7113351 Systems and methods for actuating lens assemblies Sep. 26, 2006
6097558 Digital audio signal transmission apparatus with data blocks of varying sizes Aug. 1, 2000
5815730 Method and system for generating multi-index audio data including a header indicating data quantity, starting position information of an index, audio data, and at least one index Sep. 29, 1998
5548574 Apparatus for high-speed recording compressed digital audio data with two dimensional blocks and its compressing parameters Aug. 20, 1996
5347499 Circuit for selectively setting a monaural playback channel in a stereo audio apparatus Sep. 13, 1994
5323273 Audio signal recording and playback apparatus of magnetic recording and playback apparatus Jun. 21, 1994
5276669 Synchronous recording and playback of left and right stereo channels on separate digital discs Jan. 4, 1994
5195075 Output level controlling apparatus Mar. 16, 1993
5189562 System and method for combining language translation with original audio on video or film sound track Feb. 23, 1993
4965674 Recording and reproducing system with selective matrix conversion Oct. 23, 1990
4953212 Auto voice changing apparatus Aug. 28, 1990
4863819 Read-only optical data card Sep. 5, 1989
4847816 Audio information reproducing apparatus Jul. 11, 1989
4748669 Stereo enhancement system May. 31, 1988
4603099 Method for recording motion picture images and laser written data Jul. 29, 1986
4577305 Stereophonic motion picture photographic sound-tracks compatible with different sound projection formats and record and playback apparatus therefore Mar. 18, 1986
4455634 Audio/video quality monitoring system Jun. 19, 1984
4399329 Stereophonic bilingual signal processor Aug. 16, 1983
4393489 Audio processor for single, channel, matrixed two-channel and un-matrixed two-channel signals Jul. 12, 1983
4388654 Video disc player with selectively enabled audio signal expander circuitry Jun. 14, 1983
4323934 Dropout compensation circuitry Apr. 6, 1982
4309722 Video disc player noise reduction circuit Jan. 5, 1982
4309570 Dimensional sound recording and apparatus and method for producing the same Jan. 5, 1982
4208634 Circuit for suppressing noise caused by scratches on a phonograph record Jun. 17, 1980
4202550 Stereo lead wires and arrangements thereof for connecting pick-up device to amplifier May. 13, 1980
4178489 Suspension system for disc recording cutter head Dec. 11, 1979
4176252 Multi-dimensional audio projector Nov. 27, 1979
4074084 Method and apparatus for receiving sound intended for stereophonic reproduction Feb. 14, 1978
4061889 Film with light sound track carrying the stereophonic sound information; ribbon light valve for providing the light sound track as well as light sound adapter for reproducing the information r Dec. 6, 1977
4002840 Angle-modulated signal transmission system Jan. 11, 1977
3969583 Method of stereophonic recording Jul. 13, 1976
3942190 Method and apparatus for uninterrupted recording and reproduction in a multichannel mode of information on tape Mar. 2, 1976

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