Method and apparatus for processing an audio signal associated with a video image

Abstract

An audio signal processing apparatus comprises a receiver (101) which receives an audio signal comprising audio data for at least a first audio object associated with a three dimensional image. The audio signal also comprises depth position data indicative of a target depth position for the first audio object. A determiner (107) determines a visual rendering depth range for a target three dimensional display for presenting the three dimensional image and a mapper (109) for mapping the target depth position to a rendering depth position for the audio object where the mapping is dependent on thevisual rendering depth range. The visual rendering depth range may specifically be a depth range in which the three dimensional display can accurately render objects and the mapper (109) may amend the positions of audio object sound sources such that these match the depth positions of corresponding visual objects presented by the three dimensional display.

Description

Technical field [0001] The present invention relates to a method and an apparatus for processing audio signals, and particularly but not entirely to the processing of three-dimensional audio signals for presentation with associated three-dimensional video. Background technique [0002] Audio rendering has become more and more diverse, and a series of rendering schemes and user experiences have been introduced. For example, spatial audio, which is part of the audio visual experience, has become popular especially in the form of surround sound. In such a system, images or videos are presented together with the associated spatial audio environment being created. [0003] In order to support change and flexibility in spatial audio rendering, many formats for representing spatial audio have been developed. [0004] The most recent format is the MPEG Surround (surround) format. However, although this provides a suitable format for many applications, it is still not as flexible as desire...

AI Technical Summary

Problems solved by technology

[0013] However, since rendering settings, especially video rendering settings, typically vary significantly, achieving tight spatial synchronization can be difficult, and this can lead to a degraded user experience in many situations

In particular, the capabilities and rendering characteristics of different monitors may vary significantly, and this may cause different rendering in different scenarios

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