Controllable playback system offering hierarchical playback options
First Claim
1. An apparatus, comprising:
- one or more processors; and
one or more memories including computer program code,the one or more memories and the computer program code configured, with the one or more processors, to cause the apparatus to perform at least the following;
determining, using at least two microphone signals, directional information of a sound source, wherein mid signals of the at least two microphone signals represent the directional information of the sound source and side signals of the at least two microphone signals represent ambiance information of the sound source; and
outputting a multichannel output signal for an audio playback device, wherein the multichannel output signal comprises a number of output channels dependent on an availability of output channels of the audio playback device, wherein if the multichannel output signal is binaural signals, or if the multichannel output signal is multichannel signals greater than two channels, then the multichannel output signal is outputted based on the determined directional information and the ambience information using the mid and side signals.
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Abstract
A first apparatus performs the following: determining, using at least two microphone signals corresponding to left and right microphone signals and using at least one further microphone signal, directional information of the left and right microphone signals; outputting a first signal corresponding to the left microphone signal; outputting a second signal corresponding to the right microphone signal; and outputting a third signal corresponding to the determined directional information. Another apparatus performs the following: performing at least one of the following: outputting first and second signals as stereo output signals; or converting the first and second signals to mid and side signals, and converting, using directional information for the first and second signals, the mid and side signals to at least one of binaural signals or multi-channel signals, and outputting the corresponding binaural signals or multi-channel signals. Additional apparatus, program products, and methods are disclosed.
34 Citations
23 Claims
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1. An apparatus, comprising:
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one or more processors; and one or more memories including computer program code, the one or more memories and the computer program code configured, with the one or more processors, to cause the apparatus to perform at least the following; determining, using at least two microphone signals, directional information of a sound source, wherein mid signals of the at least two microphone signals represent the directional information of the sound source and side signals of the at least two microphone signals represent ambiance information of the sound source; and outputting a multichannel output signal for an audio playback device, wherein the multichannel output signal comprises a number of output channels dependent on an availability of output channels of the audio playback device, wherein if the multichannel output signal is binaural signals, or if the multichannel output signal is multichannel signals greater than two channels, then the multichannel output signal is outputted based on the determined directional information and the ambience information using the mid and side signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus, comprising:
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one or more processors; and one or more memories including computer program code, the one or more memories and the computer program code configured, with the one or more processors, to cause the apparatus to perform at least the following; performing at least one of the following; determining a type of playback for an audio playback device; if the type of playback is a stereo playback, then outputting first and second signals as stereo output signals of a multichannel output signal for an audio playback device based on a determined directional information of a sound source, wherein the multichannel output signal comprises a number of output channels dependent on an availability of output channels of the audio playback device; if the type of playback is a binaural or greater than two channel multichannel playback;
thenconverting the first and second signals to mid and side signals wherein the mid signals represent the determined directional information of the sound source and the side signals represent ambiance information of the sound source, and outputting corresponding binaural signals or multichannel signals greater than two channels as the multichannel output signal for the audio playback device based on the determined directional information and ambiance information, wherein the multichannel output signal comprises a number of output channels dependent on an availability of output channels of the audio playback device, and wherein if the multichannel output signal is binaural signals, or if the multichannel output signal is multichannel signals greater than two channels, then the multichannel output signal is outputted based on the determined directional information and the ambience information using the mid and side signals. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A method, comprising:
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determining, using at least two microphone signals, directional information of a sound source, wherein mid signals of the at least two microphone signals represent the directional information of the sound source and side signals of the at least two microphone signals represent ambiance information of the sound source; and outputting a multichannel output signal for an audio playback device based on the determined directional information of the sound source, wherein the multichannel output signal comprises a number of output channels dependent on an availability of output channels of the audio playback device, wherein if the multichannel output signal is binaural signals, or if the multichannel output signal is multichannel signals greater than two channels, then the multichannel output signal is outputted based on the determined directional information and the ambience information using the mid and side signals.
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Specification