Method and apparatus for providing rotation of digital image data

Claim 1

An apparatus comprising: input means for latching input pixel data in a predetermined sequence; storage means, including a plurality of storage devices, coupled to the input means for storing the input pixel data latched by the input means, wherein the storage devices are arranged in a plurality of memory banks with each memory bank comprising at least one even field memory device and one odd field memory device and wherein a common bank enable line is coupled to each of the memory devices within a memory bank, an even field enable line is coupled to the even field memory devices in each of the memory banks, and an odd field enable line is coupled to the odd field memory devices in each of the memory banks; output means coupled to the storage means for retrieving the pixel data stored in the storage means and generating an output pixel data stream in accordance with a predetermined sequence; addressing means coupled to the storage means for addressing the storage devices; and control means for controlling the operation of the input means, the storage means, the output means and the addressing means in a write operation mode and a read operation mode, including the activation of the common bank enable lines, the even field enable line and the odd field enable line, wherein the input pixel data is stored in the storage devices in the write operation mode such that consecutive pixel data retrieved during the read operation mode is not stored in the same storage device.

Claim 2

An apparatus comprising: input means for latching input pixel data in a predetermined sequence; storage means, including a plurality of storage devices, coupled to the input means for storing the input pixel data latched by the input means, wherein the storage devices are arranged in a plurality of memory banks with each memory bank comprising at least one even field memory device and one odd field memory device and wherein a common bank enable line is coupled to each of the memory devices within a memory bank, an even field enable line is coupled to the even field memory devices in each of the memory banks, and an odd field enable line is coupled to the odd field memory devices in each of the memory banks; output means coupled to the storage means for retrieving the pixel data stored in the storage means and generating an output pixel data stream in accordance with a predetermined sequence; addressing means coupled to the storage means for addressing the storage devices; and control means for controlling the operation of the input means, the storage means, the output means and the addressing means in a write operation mode and a read operation mode, including the activation of the common bank enable lines, the even field enable line and the odd field enable line, wherein the input pixel data is stored in the storage devices in the write operation mode such that consecutive pixel data retrieved during the read operation mode is not stored in the same storage device.

Claim 6

A method of rotating a digital image comprising: latching input pixel data representative of the digital image in a predetermined sequence with a latch unit; storing the input pixel data latched by the input unit in a storage unit having a plurality of storage devices in a write operation mode, wherein the storage devices are arranged in a plurality of memory banks with each memory bank comprising at least one even field memory device and one odd field memory device and wherein a common bank enable line is coupled to each of the memory devices within a memory bank, an even field enable line is coupled to the even field memory devices in each of the memory banks, and an odd field enable line is coupled to the odd field memory devices in each of the memory banks; retrieving the pixel data stored in the storage unit with an output unit in a read operation mode; and generating a rotated output pixel data stream in accordance with a predetermined sequence; wherein the input pixel data is stored in the storage devices in the write operation mode by the activation of the common bank enable lines, the even field enable line and the odd field enable line such that consecutive pixel data retrieved during the read operation mode is not stored in the same storage device.

Claim 7

A method of rotating a digital image comprising: latching input pixel data representative of the digital image in a predetermined sequence with a latch unit; storing the input pixel data latched by the input unit in a storage unit having a plurality of storage devices in a write operation mode, wherein the storage devices are arranged in a plurality of memory banks with each memory bank comprising at least one even field memory device and one odd field memory device and wherein a common bank enable line is coupled to each of the memory devices within a memory bank, an even field enable line is coupled to the even field memory devices in each of the memory banks, and an odd field enable line is coupled to the odd field memory devices in each of the memory banks; retrieving the pixel data stored in the storage unit with an output unit in a read operation mode; and generating a rotated output pixel data stream in accordance with a predetermined sequence; wherein the input pixel data is stored in the storage devices in the write operation mode by the activation of the common bank enable lines, the even field enable line and the odd field enable line such that consecutive pixel data retrieved during the read operation mode is not stored in the same storage device.