Systems and methods for implementing cross-fading, interstitials and other effects downstream
First Claim
1. A audio playback device comprising:
- a playout controller configured to download a first audio clip, a second audio clip to be played following the first audio clip, and a clip transition to be played at a boundary between the first and second audio clips;
an input buffer configured to store the first and second audio clips, and the clip transition;
a decoder configured to decode the first and second audio clips, and the clip transition; and
a device performance software agent configured to adjust a download timing and one or more characteristics of the clip transition based at least in part on a performance profile of the playout controller and/or the input buffer.
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Abstract
Systems and methods are presented for cross-fading (or other multiple clip processing) of information streams on a user or client device, such as a telephone, tablet, computer or MP3 player, or any consumer device with audio playback. Multiple clip processing can be accomplished at a client end according to directions sent from a service provider that specify a combination of (i) the clips involved; (ii) the device on which the cross-fade or other processing is to occur and its parameters; and (iii) the service provider system. For example, a consumer device with only one decoder, can utilize that decoder (typically hardware) to decompress one or more elements that are involved in a cross-fade at faster than real time, thus pre-fetching the next element(s) to be played in the cross-fade at the end of the currently being played element. The next elements(s) can, for example, be stored in an input buffer, then decoded and stored in a decoded sample buffer, all prior to the required presentation time of the multiple element effect. At the requisite time, a client device component can access the respective samples of the decoded audio clips as it performs the cross-fade, mix or other effect. Such exemplary embodiments use a single decoder and thus do not require synchronized simultaneous decodes.
55 Citations
12 Claims
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1. A audio playback device comprising:
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a playout controller configured to download a first audio clip, a second audio clip to be played following the first audio clip, and a clip transition to be played at a boundary between the first and second audio clips; an input buffer configured to store the first and second audio clips, and the clip transition; a decoder configured to decode the first and second audio clips, and the clip transition; and a device performance software agent configured to adjust a download timing and one or more characteristics of the clip transition based at least in part on a performance profile of the playout controller and/or the input buffer. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A audio playback device comprising:
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a playout controller configured to download a first audio clip, a second audio clip to be played following the first audio clip, and a clip transition to be played at a boundary between the first and second audio clips; an input buffer configured to store the first and second audio clips, and the clip transition; a first decoder and a second decoder, the decoders being configured to decode the first and second audio clips, and the clip transition; and a device performance software agent configured to adjust a download timing and one or more characteristics of the clip transition based at least in part on a performance profile of the playout controller and/or the input buffer. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification