Samsung Electronics Co., Ltd.

Jin-Hyun Cho

Jung-Sun Kang

Jin-Aeon Lee

Kyung-Koo Lee

Tae-Hwan Park

Young-Ha Park

According to a coefficient variable length coding method adopting four-stage pipeline, a 3-dimension value including a run, a level and a last data is obtained by performing a run length coding upon coefficient data, where, after transferring the 3-dimension value, a variable bit vector is obtained from the transferred 3-dimension value and the variable length bit vector is stored, and where, particularly in case the pipeline breaks, the method reuses the previously obtained 3-dimension value to minimize process time such that the coefficient variable length coding is swiftly performed by the efficient pipeline operation, and the broken pipeline may be restored within minimized time.

Pipelined coefficient variable length coding

A camera interface employing a direct memory access (DMA) unit to digitally perform an image transformation such as 'flipping' and 'rotating' an image (e.g., to correct for X-axis, Y-axis, or XY-axes mirroring). The image transforming DMA unit includes an address generator and a data selector. The address generator appropriately modifies a frame start address, a burst transfer address, a line start address, of an image frame, based on the X, Y, or XY mirrored image mode. The data selector changes the sequences of words and of pixels in a word based upon the mirrored image mode. The data selector includes a plurality of pixel-sequence modifying multiplexers each for selecting between a word having an original pixel sequence stored in the buffer memory and a word having the reverse pixel sequence; and a word-sequence modifying multiplexer outputting the selected words in the original word sequence or in the reverse word sequence in response to outputs of a counter that increments or decrements based upon the mirrored image mode.

Growing community of inventors

Seongnam-si, South Korea

Jin-Hyun Cho