Manipulation of playback device response using signal processing
First Claim
1. A playback device comprisingone or more processors;
- one or more first audio drivers;
one or more second audio drivers;
one or more third audio drivers; and
a non-transitory computer-readable medium storing instructions that, when executed by the one or more processors, cause the playback device to perform functions comprising;
receiving a left channel of audio content and a right channel of the audio content;
generating a center channel of the audio content comprising a combination of the left and right channels;
providing the generated center channel to (i) the one or more first audio drivers and (ii) the one or more second audio drivers for playback of the center channel according to a first radiation pattern that has a maximum along a first direction;
generating a first side channel comprising a combination of (i) the center channel and (ii) a difference between the left channel and the right channel;
providing the generated first side channel to the one or more first audio drivers for playback of the first side channel according to a second radiation pattern that has a maximum along a second direction, wherein the first radiation pattern and the second radiation pattern combine to form a first response lobe that has a maximum along a third direction between the first and second directions;
providing the generated center channel to the one or more third audio drivers;
generating a second side channel comprising a combination of (i) the center channel and (ii) an inverse of the difference between the left channel and the right channel; and
providing the generated second side channel to the one or more third audio drivers for playback of the second side channel according to a third radiation pattern that has a maximum along a fourth direction, wherein the first radiation pattern and the third radiation pattern combine to form a second response lobe that has a maximum along a fifth direction between the first and fourth directions.
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Accused Products
Abstract
An example playback device (i) provides a center channel of audio content to one or more first audio drivers and one or more second audio drivers so that the center channel is reproduced according to a first radiation pattern and (ii) provides a side channel of audio content to the one or more first audio drivers so that the side channel is reproduced according to a second radiation pattern. The first and second radiation patterns may combine to form a response lobe that has a maximum between the respective maxima of the first and second radiation patterns. An example non-transitory computer-readable medium and an example method, both related to the example playback device, are also disclosed herein.
79 Citations
24 Claims
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1. A playback device comprising
one or more processors; -
one or more first audio drivers; one or more second audio drivers; one or more third audio drivers; and a non-transitory computer-readable medium storing instructions that, when executed by the one or more processors, cause the playback device to perform functions comprising; receiving a left channel of audio content and a right channel of the audio content; generating a center channel of the audio content comprising a combination of the left and right channels; providing the generated center channel to (i) the one or more first audio drivers and (ii) the one or more second audio drivers for playback of the center channel according to a first radiation pattern that has a maximum along a first direction; generating a first side channel comprising a combination of (i) the center channel and (ii) a difference between the left channel and the right channel; providing the generated first side channel to the one or more first audio drivers for playback of the first side channel according to a second radiation pattern that has a maximum along a second direction, wherein the first radiation pattern and the second radiation pattern combine to form a first response lobe that has a maximum along a third direction between the first and second directions; providing the generated center channel to the one or more third audio drivers; generating a second side channel comprising a combination of (i) the center channel and (ii) an inverse of the difference between the left channel and the right channel; and providing the generated second side channel to the one or more third audio drivers for playback of the second side channel according to a third radiation pattern that has a maximum along a fourth direction, wherein the first radiation pattern and the third radiation pattern combine to form a second response lobe that has a maximum along a fifth direction between the first and fourth directions. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A playback device comprising:
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one or more processors; one or more first audio drivers; one or more second audio drivers; and a non-transitory computer-readable medium storing instructions that, when executed by the one or more processors, cause the playback device to perform functions comprising; receiving a left channel of audio content and a right channel of the audio content; generating a center channel of the audio content comprising a combination of the left and right channels; providing the generated center channel to (i) the one or more first audio drivers and (ii) the one or more second audio drivers for playback of the center channel according to a first radiation pattern that has a maximum along a first direction; generating a side channel comprising a combination of (i) the center channel and (ii) a difference between the left channel and the right channel; providing the generated side channel to the one or more first audio drivers for playback of the side channel according to a second radiation pattern that has a maximum along a second direction, wherein the first radiation pattern and the second radiation pattern combine to form a first response lobe that has a maximum along a third direction between the first and second directions; attenuating a range of audio frequencies of the side channel; and amplifying the range of audio frequencies of the center channel, wherein providing the generated side channel to the one or more first audio drivers comprises providing the attenuated side channel, and wherein providing the generated center channel to (i) the one or more first audio drivers and (ii) the one or more second audio drivers comprises providing the amplified center channel. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A tangible non-transitory computer-readable medium storing instructions that, when executed by a playback device that comprises (i) one or more first audio drivers, (ii) one or more second audio drivers, and (iii) one or more third audio drivers, and cause the playback device to perform functions comprising
receiving a left channel of audio content and a right channel of the audio content; -
generating a center channel of the audio content comprising a combination of the left and right channels; providing the generated center channel to (i) the one or more first audio drivers and (ii) the one or more second audio drivers for playback of the center channel according to a first radiation pattern that has a maximum along a first direction; generating a first side channel comprising a combination of (i) the center channel and (ii) a difference between the left channel and the right channel; and providing the generated first side channel to the one or more first audio drivers for playback of the first side channel according to a second radiation pattern that has a maximum along a second direction, wherein the first radiation pattern and the second radiation pattern combine to form a first response lobe that has a maximum along a third direction between the first and second directions; providing the generated center channel to the one or more third audio drivers; generating a second side channel comprising a combination of (i) the center channel and (ii) an inverse of the difference between the left channel and the right channel; and providing the generated second side channel to the one or more third audio drivers for playback of the second side channel according to a third radiation pattern that has a maximum along a fourth direction, wherein the first radiation pattern and the third radiation pattern combine to form a second response lobe that has a maximum along a fifth direction between the first and fourth directions. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A playback device comprising:
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one or more processors; one or more first audio drivers; one or more second audio drivers; one or more third audio drivers; and a non-transitory computer-readable medium storing instructions that, when executed by the one or more processors, cause the playback device to perform functions comprising; receiving a center channel of audio content and a side channel of the audio content; providing the center channel of the audio content to (i) the one or more first audio drivers, (ii) the one or more second audio drivers, and (iii) the one or more third audio drivers for playback of the center channel according to a first radiation pattern that has a maximum along a first direction; providing the side channel to the one or more first audio drivers for playback of the side channel according to a second radiation pattern that has a maximum along a second direction, wherein the first radiation pattern and the second radiation pattern combine to form a first response lobe that has a maximum along a third direction between the first and second directions; generating an inverted side channel comprising an inverse of the side channel; and providing the inverted side channel to the one or more third audio drivers for playback of the inverted side channel according to a third radiation pattern that has a maximum along a fourth direction, wherein the first radiation pattern and the third radiation pattern combine to form a second response lobe that has a maximum along a fifth direction between the first and fourth directions. - View Dependent Claims (22, 23, 24)
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Specification