摘要:
Circuit and methods provide for adjustable power consumption using a plurality of memory controllers. In one example, a first memory controller has a first power consumption level. A second memory controller has a second power consumption level that differs from the first power consumption level. Memory controller bypass logic is connected to the first and second memory controllers and selects for a memory client at least one of the first and second memory controllers in response to a change in a power conservation condition.
摘要:
A video decoder (10) with reduced power consumption includes a power management controller (45) that is operative to select one of a plurality of different power consumption states for a video decoder (10), and, in response to the determination, vary power consumption of at least one operational portion of the video decoder (10). In addition, in one example, a method (200) for reducing power consumption for a video decoder (10) includes determining input stream encoding description data (34) to select one of a plurality of different power consumption states for a video decoder (10) and, in response to the determination, varying power consumption of at least one operational portion of the video decoder (10).
摘要:
In one aspect, there is provided a video decoder including a first write port to write uncompressed video data to a first buffer in a first format adapted based on an input required by the video decoder and to suppress writing to the first buffer. The video decoder also includes a second write port to write uncompressed video data to a second buffer in a second format adapted to provide the uncompressed video data for subsequent processing external to the video decoder.
摘要:
A video processing apparatus, for use in a video receiver, includes a decoder configured to decode encoded video information into decoded video information and to output the decoded information, and a configuration module coupled to the decoder and configured to a provide a control signal to the decoder indicative of a reduced-image portion of the video frames to be displayed, where the decoder is configured to respond to the control signal by decoding first macroblocks of the video information within the reduced-image portion and second macroblocks of the video information, in a reference section, adjacent the first macroblocks to account for motion of the images in the reduced-image portion without decoding third macroblocks lying outside of the reduced-image portion and the reference section.
摘要:
A system for decoding a video bitstream and a method for replacing image data in a motion prediction cache are described. For each of the cache lines, a tag distance between pixels stored in the cache line and uncached pixels that are to be stored in the cache is calculated. The calculated tag distance is used to determine whether the pixels are outside a local image area defined about the uncached pixels. Pixels determined to be outside the local image area are replaced with the uncached pixels. The motion prediction cache can be organized as sets of cache lines and the method can be performed for each of the cache lines in one of the sets. The definition of the sets can be changed in response to cache performance. Similarly, the local image area can be redefined in response to cache performance.
摘要:
A method and system for spatially compositing digital video images with a tile pattern library. Spatial compositing uses a graphics pipeline to render a portion (tile) of each overall frame of digital video images. This reduces the amount of data that each processor must act on and increases the rate at which an overall frame is rendered. Optimization of spatial compositing depends on balancing the processing load among the different pipelines. The processing load typically is a direct function of the size of a given tile and an inverse function of the rendering complexity for objects within this tile. Load balancing strives to measure these variables and adjust, from frame to frame, the number, sizes, and positions of the tiles. The cost of this approach is the necessity to communicate, in conjunction with each frame, the number, sizes, and positions of the tiles. A tile pattern library is a collection of sample compositing windows of various shapes each of which is decomposed into tiles of various shapes and positions. Associated with each sample in the tile pattern library is an index code that can be used to communicate the overall pattern. This reduces the amount of data needed to convey the parameters that define each tile.
摘要:
A video frame detector circuit used in synchronizing one video signal with another video signal. The video frame detector of the present invention is able to automatically detect a start of frame portion of any video composite synchronization signal connected to it without requiring programming. The start of frame commences with the least frequent vertical field, or if all fields are equally frequent, a deterministic process is used to promote one of the fields to be the start of the frame. Since the video frame detector circuit of the present invention does not require programming to recognize various video signal formats, it readily adapts to different video signal conditions with little or no manual intervention. The video frame detector contains a number of memory stores for storing previously detected video patterns obtained from a composite synchronization signal. Once a current pattern is ascertained from the composite synchronization signal, it is compared against the stored patterns. Information regarding recognized patterns is stored in a history FIFO. New patterns are stored in vacant memories replacing those stored patterns that are most frequently seen. Frequency counters maintain information as to the frequency of each stored pattern. A state machine assumes that the least frequently ascertained patterns are the start of frame portion and generates a start of frame pulse accordingly. The start of frame pulse can be delayed to properly align with the video signal.
摘要:
Various integrated circuits and methods of making and operating the same are disclosed. In aspect, a method of operating an integrated circuit is provided. The method includes, in a compute unit that has a first lane and a second lane, executing operations with the first lane and the second lane. The first lane and the second lane are monitored for an indicator of asynchronous operation. An input voltage of one or both of the first lane and the second lane is selectively adjusted if the indicator of asynchronous operation is detected.
摘要:
A device includes a processor that is operative to process a data stream such as executable code, encoded video or other suitable data stream, and has a plurality of processor portions. The device further includes a power management controller coupled to the processor portions that controls power consumption of the processor portions based on application profile data associated with the data stream. The application profile data may be included with executable code or provided separately and may directly indicate usage/nonusage of portions of the processor or the data stream may have inherent application profile data in the header that indirectly identifies usage of the processor portions.
摘要:
Circuit and methods provide for adjustable power consumption using a plurality of memory controllers. In one example, a first memory controller has a first power consumption level. A second memory controller has a second power consumption level that differs from the first power consumption level. Memory controller bypass logic is connected to the first and second memory controllers and selects for a memory client at least one of the first and second memory controllers in response to a change in a power conservation condition.