Abstract: Apparatuses and methods for providing data consistency messaging for shared memory systems are disclosed herein. An example apparatus may include a producer processor unit configured to provide a memory access packet and a first notification packet. The first notification packet may include identification of a consumer processor unit. The example apparatus may further include a shared resource configured to receive the memory access packet and the notification packet. Responsive to reception of the memory access packet, the shared resource may be configured to perform a memory access operation. Responsive to reception of the notification packet, the shared resource may be further configured to route a first notification packet to the consumer processor unit. The second notification packet may include information indicating the shared resource is available.

Abstract: A circuit arrangement and method utilize a hierarchical pipelined memory-access structure incorporating deferred arbitration logic. A multi-stage pipelined network defines at least one pipeline between a plurality of initiators and a shared resource. The multi-stage pipelined network includes first and second stages, where the first stage is disposed intermediate the second stage and the shared resource. First and second arbitration circuits are coupled respectively to the first and second stages of the multi-stage pipelined network, with each arbitration circuit configured to receive requests for access to the resource from at least one initiator and forward such requests to the shared resource.

Abstract: The color-keyed regions of a color-keyed image are extracted from the color-keyed image, and the color-keyed regions and the non-color-keyed regions are independently scaled. The independently scaled regions are subsequently merged to form a scaled color-key image with clearly distinguished color-keyed regions and non-color-keyed regions. To minimize the blurring of edges in the non-color-key regions, the non-color-key colors are extended into color-keyed regions after the color-keyed information is extracted from the color-keyed image. To minimize the encroachment of the scaled color-keyed regions into the scaled non-color-keyed regions of the scaled color-key image, the edges of the scaled color-key regions are sharpened by defining the color-keyed region as the region wherein each scaled/filtered color-key value exceeds a non-zero threshold value. To facilitate the use of existing memory and structure in images that are encoded using three components per pixel, such as RGB, YUV, etc.

Abstract: The same circuitry is used for effecting FIR filtering and color space transformation. The input to a multiply-add array of a conventional FIR filter is appropriately multiplexed to provide the alternative uses of the same multiply-add array. In this manner, for example, the same multiply-add array can be used for scaling an image and for transforming the image from one color space to another.

Abstract: The color-keyed regions of a color-keyed image are extracted from the color-keyed image, and the color-keyed regions and the non-color-keyed regions are independently scaled. The independently scaled regions are subsequently merged to form a scaled color-key image with clearly distinguished color-keyed regions and non-color-keyed regions. To minimize the blurring of edges in the non-color-key regions, the non-color-key colors are extended into color-keyed regions after the color-keyed information is extracted from the color-keyed image. To minimize the encroachment of the scaled color-keyed regions into the scaled non-color-keyed regions of the scaled color-key image, the edges of the scaled color-key regions are sharpened by defining the color-keyed region as the region wherein each scaled/filtered color-key value exceeds a non-zero threshold value. To facilitate the use of existing memory and structure in images that are encoded using three components per pixel, such as RGB, YUV, etc.