EP0487181A2
Expired / Lapsed
EP
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Sound field compensating apparatus
Assignee: Pioneer Corp
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Filing: 1991-06-07
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Granted: —
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Expires: 2011-06-07
Abstract
Abstract A sound field compensating apparatus is provided in which delay data produced by one of the delay means (33, 34) in a FIR filter (31), which is realized by the action of a DSP, is commonly used for producing a plurality of reflected sound data of corresponding channels. Accordingly, the maximum delay time of the delay data is lengthened without increasing the number of delay data retrieving actions per sampling period on the delay memory. Hence, an acceptable number of the reflected sound signals can be obtained for each channel.
Inventors
- 👤 Fumio c/o Pioneer Ohmori Plant Matsushita
- 👤 Hiroshi c/o Pioneer Ohmori Plant Tsubonuma
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 04:18
CPC Classifications
G; G10; G10K; G10K15/00; G10K15/08; G10K15/12; H; H03; H03H; H03H17/00; H03H17/02; H03H17/06; H04; H04S; H04S1/00; H04S1/007; H04S5/00; H04S5/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
122 words
A sound field compensating apparatus comprising; FIR filters, each FIR filter having delay means for producing a plurality of different delay time data through delaying the input audio signal for each sampling data with the use of a delay memory and multiplier and adder means for multiplying the factor of each delay data by the factor of a coefficient in order to produce a series of reflected sound data and adding said reflected sound data together, means for obtained driving signals for driving their respective loudspeakers in accordance with output signals of said FIR filters, and each delay means of said FIR filter being associated with a multiplicity of the multiplier and adder means for production of a plurality of output signals.
Claim 2
Dependent Claim
23 words
A sound field compensating apparatus according to claim 1, wherein the FIR filters are realized by the action of a digital signal processor.
Claim 3
Dependent Claim
61 words
A sound field compensating apparatus according to claim 2, wherein the digital signal processor has at least two separate data buses so that the production of the delay data is executed using one of the two data bus and the multiplication and addition of the delay data is executed using the other data bus in accordance with a parallel processing program.
References Cited (Backward Citations)
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