compressor_jp Directory Reference

Files
file	bit_stuffer_27_32.v [code]
	Aggregate MSB aligned variable-length (1..27) data to 32-bit words.
file	bit_stuffer_escape.v [code]
	Escapes each 0xff with 0x00, 32-bit input and output.
file	bit_stuffer_metadata.v [code]
	Bit stuffer combines variable length fragments (up to 16 bits long) from the Huffman encoder to a byte stream, escapes every 0xff byte with 0x00 and adds file length and timestamp metadata.
file	cmprs_buf_average.v [code]
	Saves Y and C components to buffers, caculates averages during write, then subtracts them during read and provides to the after DCT to restore DC.
file	cmprs_cmd_decode.v [code]
	Decode compressor command/modes, reclock some signals.
file	cmprs_frame_sync.v [code]
	Synchronizes memory channels (sensor and compressor)
file	cmprs_macroblock_buf_iface.v [code]
	Communicates with compressor memory buffer, generates pixel stream matching selected color mode, accommodates for the buffer latency, acts as a pacemaker for the whole compressor (next stages are able to keep up).
file	cmprs_out_fifo.v [code]
	Compressor output FIFO.
file	cmprs_out_fifo32.v [code]
	Compressor output FIFO, modified to use 32-bit input and xclk.
file	cmprs_pixel_buf_iface.v [code]
	Communicates with compressor memory buffer, generates pixel stream matching selected color mode, accommodates for the buffer latency, acts as a pacemaker for the whole compressor (next stages are able to keep up).
file	cmprs_status.v [code]
	Generate compressor status word.
file	cmprs_tile_mode2_decode.v [code]
	Decode mode parameters, registered at pre-start of the macroblock data to color conversion module.
file	cmprs_tile_mode_decode.v [code]
	Decode tile/macroblocks parameters from compressor type.
file	compressor393.v [code]
	Top module containg all compressor channels.
file	csconvert.v [code]
	Color space convert: combine differnt color modes.
file	csconvert18a.v [code]
	Color space converter (bayer-> YCbCr 4:2:1) for JPEG compressor. Uses 18x18 pixel overlapping macroblocks for color conversion.
file	csconvert_jp4.v [code]
	Color conversion for JP4 mode.
file	csconvert_jp4diff.v [code]
	Color conversion for JP4 differential.
file	csconvert_mono.v [code]
	Convert JPEG monochrome.
file	dcc_sync393.v [code]
	Synchronises output of DC components Syncronizes dcc data with dma1 output, adds 16..31 16-bit zero words for Axis DMA Was not used in late NC353 camera (DMA channel used fro IMU logger)
file	encoderDCAC393.v [code]
	RLL encoder for JPEG compressor.
file	focus_sharp393.v [code]
	Module to determine focus sharpness on by integrating DCT coefficient, multiplied my 8x8 array and squared.
file	huff_fifo393.v [code]
	Part of Huffman encoder for JPEG compressor - FIFO for Huffman encoder based on earlier design that used 2x clock. Superseded by huffman_stuffer_meta.
file	huffman393.v [code]
	Huffman encoder for JPEG compressor based on previous design that used 2x clock. Superseded by huffman_stuffer_meta module.
file	huffman_merge_code_literal.v [code]
	Merge 1-16 bits of Huffman code with 0..11 bits of literal data, align result to MSB : {huffman,literal, {n{1'b0}}.
file	huffman_snglclk.v [code]
	Huffman encoder for JPEG compressor, redesigned to use single rate pixel clock.
file	huffman_stuffer_meta.v [code]
	Wrapper fior several JPEG/JP4 compression modules. It includes.
file	jp_channel.v [code]
	Top module of JPEG/JP4 compressor channel.
file	quantizer393.v [code]
	Quantizer module for JPEG/JP4 compressor.
file	stuffer393.v [code]
	Bit stuffer for JPEG/JP4 compressor based on earlier design Now used for comparison only, functionality is reimplemented in bit_stuffer_metadata module.
file	varlen_encode393.v [code]
	Part of the Huffman encoder for JPEG compressor - variable length encoder. Used double clock rate, superseded by varlen_encode_snglclk, left for comparison.Encoder will work 2 cycles per "normal" word, 1 cycle for codes "00" and "f0", only magnitude output is needed ASAP (2 cycles, the value out should be valid on the 5-th cycle - it will latency 4 cycles run each other cycle. Later implementsed a shortcut - all codes processed in 2 cycles.
file	varlen_encode_snglclk.v [code]
	Part of the Huffman encoder for JPEG compressor - variable length encoder. Uses single pixel clock rate.