METHOD AND SYSTEM FOR REDUCING THE IMPACT OF LATENCY ON VIDEO PROCESSING
First Claim
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1. A method for reducing the impact of latency on video processing, wherein the method comprises:
- entering a low power PCI-E state;
determining a memory access time according to a video processing event; and
transitioning to a full power PCI-E state based on the memory access time.
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Abstract
The disclosed systems and methods relate to reducing the effect of video processing latency in devices that utilize PCI Express Active State Power Management (PCI-E ASPM). Power state transition delay may be reduced by initiating an early L1 exit based on a video processing stimulus. Aspects of the present invention may enable a higher level of performance and responsiveness while supporting the benefits of ASPM. Aspects of the present invention may be embodied in a video processing device that uses a video accelerator with a PCI-E interface.
12 Citations
23 Claims
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1. A method for reducing the impact of latency on video processing, wherein the method comprises:
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entering a low power PCI-E state; determining a memory access time according to a video processing event; and transitioning to a full power PCI-E state based on the memory access time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for reducing the impact of latency during video processing, wherein the system comprises:
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an interface having a power management feature, wherein the power management feature comprises a low power PCI-E state and a full power PCI-E state; and a video processor for instructing the interface to initiate a transition from the low power PCI-E state to the full power PCI-E state, wherein the video processor determines a requirement for the full power PCI-E state. - View Dependent Claims (14, 15, 16, 17)
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18. A video processor, wherein the video processor comprises:
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a video encoder for compressing video data and instructing a PCI-E interface to initiate a transition from a low power state to a full power state; and a multiplexer for merging the compressed video data with a digital audio signal. - View Dependent Claims (19)
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20. A video processor, wherein the video processor comprises:
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a video decoder for decompressing video data and instructing a PCI-E interface to initiate a transition from a low power state to a full power state; and a post-processor for formatting the decompressing video data. - View Dependent Claims (21)
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22. A video processor, wherein the video processor comprises:
a video transcoder for changing the compression scheme of encoded video data from a first standard to a second standard and instructing a PCI-E interface to initiate a transition from a low power state to a full power state. - View Dependent Claims (23)
Specification