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Spatial sound reproduction

A sound reproduction and space technology, applied in stereo systems, quasi-stereo systems, electrical components, etc., can solve problems such as degradation and inability to provide the best spatial experience, and achieve the effect of improving spatial reproduction, improving spatial experience, and improving listening experience.

Inactive Publication Date: 2012-10-10
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, while such spatial sound reproduction techniques improve the listening experience, they often have some associated drawbacks
In particular, rendering may not provide an optimal spatial experience in all situations, and signal processing may actually lead to a degraded spatial experience in some situations

Method used

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Examples

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Embodiment Construction

[0053] The following description focuses on an embodiment of the invention applicable to spatial sound reproduction using a stereo signal upmixed to three channels. However, it will be appreciated that the invention is not limited to this application, but may be applied to many other audio signals and reproduction methods.

[0054] figure 1 An example of a system for reproducing sound according to some embodiments of the invention is shown. The system comprises a receiver 101 which receives a spatial audio signal comprising a plurality of audio channels. In this example, the input signal is a stereo signal, but it will be appreciated that in other embodiments other numbers of channels may be employed. For example, the input signal may be a five-channel surround sound input signal. In some scenarios, the input signal may be an encoded signal, and the receiver 101 may be arranged to partially or fully decode the input signal for further processing by the system. For example,...

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Abstract

An apparatus for spatial sound reproduction comprises a receiver (101) for receiving a multi-channel audio signal. An analyzer (107) determines a spatial property of the multi-channel audio signal, such as a spatial complexity or organization. A selection processor (109) then selects a reproduction mode from a plurality of sound reproduction modes where the multi-channel sound reproduction modes employ different spatial rendering techniques. A reproduction circuit (103) then drives a set of loudspeakers (105) to reproduce the multi-channel audio signal using the selected reproduction mode. The switching between the reproduction modes may be fast (e.g. in the order of 100 ms to 10 secs) thereby allowing a short term adaptation of the reproduction mode to the signal characteristics. The approach may in particular provide an improved spatial experience to a listener.

Description

technical field [0001] The present invention relates to spatial sound reproduction, and in particular but not exclusively to spatial sound reproduction comprising upmixing of multi-channel audio signals. Background technique [0002] Spatial sound reproduction in the form of stereo recording and reproduction has been around for decades. Over the past few decades, more advanced arrangements and signal processing have been used to provide an improved spatial listening experience. In particular, the use of surround sound using eg 5 or 7 spatial speakers has become popular to provide an enhanced experience in conjunction with eg movie or television viewing. Additionally, compact multi-driver loudspeaker systems such as "sound bars" have become a popular choice for traditional stereo and 5.1 systems. These devices offer the listener the experience of a spacious sound image even from a small device. This is based on the digital processing of the signal and the special physical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S7/00H04S3/00
CPCH04S5/005H04S2400/03H04S3/002
Inventor A.S.赫梅W.P.J.德布鲁恩
Owner KONINK PHILIPS ELECTRONICS NV
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