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ADV601

ADV601首页预览图
型号: ADV601
PDF文件:
  • ADV601 PDF文件
  • ADV601 PDF在线浏览
功能描述: Low Cost Multiformat Video Codec
PDF文件大小: 606.16 Kbytes
PDF页数: 共52页
制造商: AD[Analog Devices]
制造商LOGO: AD[Analog Devices] LOGO
制造商网址: http://www.analog.com
捡单宝ADV601
PDF页面索引
120%
ADV601
–31–
REV. 0
Table XVIII. ADV601 Field and Block Delimiters (Codes)
Code Name Code Description (Align all #Delimiter Codes to 32-Bit Boundaries) (Continued)
<BW> (16 bits, 8.8) This data code is not entropy coded, is always 16 bits in length and defines the Bin
Width Quantizer control used on all data in the block sub-band. During decode, this
value is used by the Quantizer. If this value is set to zero during decode, all Huffman
data is presumed to be zero and is ignored, but must be included. During encode, this
value is calculated by the external DSP and is inserted into the bit stream by the
ADV601 (this value is not used by the quantizer). Another value calculated by the
DSP, 1/BW is actually used by the Quantizer during encode.
<HUFF_DATA> (Modulo 32) This data is the quantized and entropy coded block sub-band data. The data’s length is
dependent on block size and entropy coding so it is therefore variable in length. This
field is filled with 1s making it Modulo 32 bits in length. Any Huffman decode process
can be interrupted and reset by any unexpectedly received # delimiter following a bit
error or synchronization problem.
#EOS 0xffffffffc0ffffff The host sends the #EOS (End of Sequence) to the ADV601 during decode after the
last field in a sequence to indicate that the field sequence is complete. The ADV601
does not append this code to the end of encoded field sequences; it must be added by
the host.
Table XIX. Video Data Bitstream for One Field In a Video Sequence
1
ffff ffff 4000 0000 0000 0000 0000 0000 0000 0000 8400 00ff df0d 8eff ffff ffff
8400 00ff df0c daff ffff ffff 8300 00ff 609f ffff ffff ffff 8300 00fe c5af ffff
ffff ffff 8300 00ff 609f ffff ffff ffff 8300 00fe c5af ffff ffff ffff 8300 00ff
609f ffff ffff ffff 8300 00fe c70f ffff ffff ffff 8300 00ff 609f ffff ffff ffff
8300 00fe c70f ffff ffff ffff 8300 00ff 609f ffff ffff ffff 8300 00fe c78f ffff
ffff ffff 8300 00ff 609f ffff ffff ffff 8300 00fe c78f ffff ffff ffff 8300 00ff
6894 3fff ffff ffff 811d 40f0 90ff ffff ffff ffff 8300 00ff 6894 3fff ffff ffff
811d 40f0 90ff ffff ffff ffff 8300 00ff 68aa bfff ffff ffff 8116 80f0 9bff ffff
ffff ffff 8300 00ff 68aa bfff ffff ffff 8116 80f0 9bff ffff ffff ffff 8300 00ff
6894 3fff ffff ffff 8116 80f0 9fff ffff ffff ffff 8300 00ff 6894 3fff ffff ffff
8116 80f0 9fff ffff ffff ffff 8300 00ff fe62 a2ff ffff ffff 8103 e6e9 d74d 75d7
5d75 d75a f8f9 74eb d7af 5ebd 7af5 ebf0 f8f8 f979 7979 7979 7979 79fd 5f5f c7e3
f1f8 fc7e 3f1f 8fc7 e5fa ff6f d5f6 7d9f 67d9 f67d 9f67 d9f6 7edf abec f87c 3e1f
0f87 c3e1 f0f8 fd9f 1f1f 2f2f 2f2f 2f2f 2f2f 2f1f 2ebd 7af5 ebd7 ae9d 74e9 a56d
6b5a d6b5 a2b0 d249 24a5 ce36 db6d b6db 6db7 c6fd fd3d 3d3d 3d3d 3d3d 3d3b 7a7b
fbfb fbfb fbfb fbfb fcfd bdfe dfb7 edfb 7eef bbee fbbe dfbb dbe7 f6fd ff7f dff7
fdff 7fdf f7fd feff 3fbb effb feff bfef fbfe ffbf efff ffff ffff ffff 8300 00ff
fe62 a2ff ffff ffff 8103 e6fd bfab f9bf 57d5 f2eb 18f4 f9fd ffb7 f5ff 3feb fafc
7431 e9f4 fbff 77eb fd3f b3ec f2d5 efeb f6fe 1fbb f67e afdb f0f3 aaed edf7 fe3f
57ed fd7f bbe3 d2d3 dfe7 f87e 5f57 eefd 9fbb e5d6 2fdf e7f8 7eff abf7 7ecf ddf2
eb17 eff3 fc3f 7fd5 fbbf 67ee f975 8bf7 f9fe 1fbf eafd dfb3 f77c bac5 fbfc ff0f
dff5 7eef d9fb be5d 62fd fe7f 87ef fabf 77ec fddf 2eb1 7eff 3fc3 f7fd 5fbb f67e
ef97 58bf 7f9f e1fb feaf ddfb 3f77 cbac 5fbf cff0 fdff 57ee fd9f bbe5 d62f dfe7
f87e ffaf f77e cfab e5d6 2fe9 f3fc 7f7f d9f5 7edf abc7 431e 9f4f c7f8 7fff ffff
ffff ffff 8400 00ff dfb7 c5ff df0d 7fff ffff ffff 8202 9afc 3eff b7e9 ede9 e9e9
e9e9 e9e9 e9e9 e9e9 e9e9 e9e9 e9e9 dbef fbbe 9efe 9dbb 76ed dbb7 6edd bb76 eddb
b76e ddb7 fbbe df9f af6d b6db 6db6 db6d b6db 6db6 db6d aff6 fd3d bbed 7bde f7bd
ef7b def7 bdef 75f4 f7f4 dee9 2492 4924 924c fa7b 77da 6991 f4f7 efb4 d323 e9ed
df69 a647 d3db bed3 4c8f a7b7 7da6 991f 4f7e fb4d 323e 9edd f69a 647d 3dbb ed34
c8fa 7b77 da69 647c fd7b 6100 0000 0045 bdfd 37bb 8888 8888 8888 8888 8aff ffff
ffff ffff 8400 00ff c9a7 1fff ffff ffff 820f 00ff 7704 4fff ffff ffff 8400 00ff
c9a7 1fff ffff ffff 820f 00ff 7704 bfff ffff ffff 8400 00ff c9a7 1fff ffff ffff
8213 80ff 7703 5fff ffff ffff 8200 00ff 7743 1fff ffff ffff 8200 00ff 7743 1fff
ffff ffff 8200 00ff 7745 efff ffff ffff 8400 00ff df0c daff
NOTE
1
This table shows ADV601 compressed data for one field in a color ramp video sequence. The SOF# and SOB# codes in the data are in bold text.
Bit Error Tolerance
Bit error tolerance is ensured because a bit error within a
Huffman coded stream does not cause #delimiter symbols to be
misread by the ADV601 in decode mode. The worst error that
can occur is loss of a complete block of Huffman data. With the
ADV601, this type of error results only in some blurring of the
decoded image, not complete loss of the image.
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