System for performing finite input response (FIR) filtering in motion estimation
First Claim
1. A system for performing FIR filtering in motion estimation, comprising:
- an array of a plurality of random access memories (RAMs) for storing at least one two-dimensional (2D) block of pixel data for a plurality of pixels, wherein said at least one block of pixel data is stored in said array of RAMs such that pixels, of each given column from said at least one 2D block of pixel data, are stored in different ones of said plurality of RAMs, or pixels, of each given row from said at least one 2D block of pixel data, are stored in different ones of said plurality of RAMs;
a control block for providing address translation between data arranged in said at least one 2D block of pixel data and corresponding addresses in said array of RAMs wherein pixels, of each given column from said at least one 2D block of pixel data, are stored in different ones of said plurality of RAMs, or pixels, of each given row from said at least one 2D block of pixel data, are stored in different ones of said plurality of RAMs;
an input crossbar for writing pixel data to said array of RAMs as directed by said control block;
an output crossbar for simultaneously reading pixel data from each one of said plurality of RAMs of said array and passing said data read from each of said plurality of RAMs to an appropriate replicated data path, as directed by said control block; and
a single instruction multiple data path (SIMD) block comprising a plurality of replicated data paths for simultaneously performing said FIR filtering on each of said replicated data paths, as directed by said control block.
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Abstract
A system for performing finite input response filtering. The system includes an array of random access memories (RAMs) for storing at least one two-dimensional (2D) block of pixel data. The pixel data is stored such that one of each type of column or row from the 2D block of pixel data is stored per RAM. A control block provides address translation between the 2D block of pixel data and corresponding addresses in the array of RAMs. An input crossbar writes pixel data to the array of RAMs as directed by the control block. An output crossbar simultaneously reads pixel data from each of the array of RAMs and passes the data to an appropriate replicated data path, as directed by the control block. A single instruction multiple data path block includes a plurality of replicated data paths for simultaneously performing the FIR filtering, as directed by the control block.
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Citations
19 Claims
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1. A system for performing FIR filtering in motion estimation, comprising:
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an array of a plurality of random access memories (RAMs) for storing at least one two-dimensional (2D) block of pixel data for a plurality of pixels, wherein said at least one block of pixel data is stored in said array of RAMs such that pixels, of each given column from said at least one 2D block of pixel data, are stored in different ones of said plurality of RAMs, or pixels, of each given row from said at least one 2D block of pixel data, are stored in different ones of said plurality of RAMs; a control block for providing address translation between data arranged in said at least one 2D block of pixel data and corresponding addresses in said array of RAMs wherein pixels, of each given column from said at least one 2D block of pixel data, are stored in different ones of said plurality of RAMs, or pixels, of each given row from said at least one 2D block of pixel data, are stored in different ones of said plurality of RAMs; an input crossbar for writing pixel data to said array of RAMs as directed by said control block; an output crossbar for simultaneously reading pixel data from each one of said plurality of RAMs of said array and passing said data read from each of said plurality of RAMs to an appropriate replicated data path, as directed by said control block; and a single instruction multiple data path (SIMD) block comprising a plurality of replicated data paths for simultaneously performing said FIR filtering on each of said replicated data paths, as directed by said control block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for performing FIR filtering in motion estimation, comprising:
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an array of a plurality of random access memories (RAMs) for storing at least one two-dimensional (2D) block of pixel data for a plurality of pixels, wherein said at least one block of pixilated data is stored in said array of RAMs in a manner that multiple rows or columns of said at least one block, of pixilated data used for motion estimation can be read simultaneously by storing pixels, of each given column or each given row of said at least one 2D block of pixel data, in different ones of said plurality of RAMs, such that a set of pixels of the given column or the given row are each stored at different addresses within each respective one of the plurality of RAMs; an input crossbar for receiving said at least one 2D block of pixel data and writing said at least one block of pixilated data to said array of RAMs, wherein pixels, of each given column or each given row of said at least one 2D block of pixel data, are stored in different ones of said plurality of RAMs, such that a set of pixels of the given column or the given row are each stored at different addresses within each respective one of the plurality of RAMs; an output crossbar for simultaneously reading pixel data from each one of said plurality of RAMs of said array and passing said data read from each of said plurality of RAMs to an appropriate replicated data path, wherein one pixel, of each given column or each given row of said at least one 2D block of pixel data, is stored in different ones of said plurality of RAMs, such that a set of pixels of the given column or the given row are each stored at different addresses within each respective one of the plurality of RAMs; a single instruction multiple data path (SIMD) block comprising a plurality of replicated data paths for simultaneously performing said FIR filtering on each of said replicated data paths, wherein each of said replicated data paths comprises an adder stage, a multiplier stage, and an accumulator stage; and a control block for controlling data flow through said array of RAMs, said input cross bar, said output crossbar and said plurality of replicated data paths. - View Dependent Claims (12, 13, 14, 15)
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16. A system for performing FIR filtering in motion estimation comprising:
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a plurality of storage traits for storing pixel data corresponding to at least;
one two-dimensional (2D) block of pixel data wherein each of a set of pixels of a given column;
or a given row of said at least one 2D block of pixel data is stored separately in different ones of said plurality of storage units in a manner that multiple rows or columns of said at least one block of pixel data can be read simultaneously from each one of said plurality of storage units;a single instruction multiple data path (SIMD) block comprising a plurality of replicated data paths for simultaneously performing said FIR filtering of said at least one 2I) block of pixel data stored in said plurality of storage unit on each of said replicated data paths; and control block for controlling data flow through said storage block and said SIMD block; wherein said plurality of storage units further comprises; an array of random access memories (RAMs) for storing said pixel data wherein said at least one block of pixilated data is stored in said array of RAMs such that one of each type of column or row from said at least one 2D block of pixels is stored in a different one of the plurality of RAMs of the array; wherein said control block provides address translation between data received from said at least one 2D block of pixel data and corresponding addresses in said array of RAMs; an input crossbar for writing pixel data to said array of RAMs as directed by said control block; and an output crossbar for simultaneously reading pixel data from each one of said plurality of RAMs of said array and passing said data read from each of said plurality of RAMs m an appropriate replicated data path, as directed by said control block. - View Dependent Claims (17, 18, 19)
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Specification