IC697VDR150
IC697VDR150
IC697VDR150
IC697VDR150
1.1 音视频协议、通讯协议介绍
1.1.1 两大标准制定组织
这里的标准，主要指的是音视频压缩标准。两大组织分别是国际标准化组织（ISO）和国际电信联盟（ITU），相信IT行业的从业者没听说过这两个行业的人很少。
在音视频压缩标准方面，mpeg系列的协议是ISO制定的标准，而H系列的协议则是ITU制定的标准。
1.1.2 视频协议
目前主要的视频压缩协议有：H.261、H.263、H.264和mpeg-1、mpeg-2和mpeg-4。第一个视频压缩标准是H.261，它的算法现在来看，非常简单，但是，它的很多视频压缩的思想，一直影响到现在新的压缩标准H.264。H.264单看名字，感觉是ITU组织制定的，其实它还有一个名字叫mpeg-4 Part 10，翻译过来叫mpeg-4 第十部分，这是因为H.264是ISO和ITU组织共同制定的，版权共享。其实，一直以来，H系列的标准制定者和mpeg系列的标准制定者基本上就是同一群人，而且，这两个系列的算法思想基本上都差不多，唯一有一点不同的协议是mpeg-4，它在它的高级profile中提出了小波变换等算法来实现视频压缩，从实际发展看，个人感觉不是很成功，采用小波变换的商用codec很少，这可能和这些算法的达不到实时性有关系。P0920SQ OSC13 (N.O. Dry Relay) Output Signal Conditioner
P0920SR OSC15 Hi Current Dry Output Signal Module, 5 AMP
P0920SS OSC18 Hi Current Dry Output Signal Module, 8 AMP
P0921CE 3 Ft Fieldbus Cable
P0921CF 10 Ft Fieldbus Cable
P0922AD WP20/30 GCIO w/TS For Sony 5402 (MIW Top) (EC96)
P0922AE MIW GCIO w/TS For Sony 5402 (EC96)
P0922AF WP20/30 GCIO w/TS w/Tabletop For Sony 5402 (EC96)
P0922AG 50/70 Series GCIO w/TS For Sony 5402 (EC96)
P0922AS Upgrade Kit, MIC, Embedded 21" CRT
P0922AW GCIO Cable, 2 Ft Serial
P0922AY Upgrade Kit, MIC, Top Mounted 21" CRT
P0922BD 100 Ft Audio Extender Cable, NT
P0922BE 100 Ft Mouse/Keyboard Extender Cable, NT
P0922BF TR5 Tape Drive Upgrade Kit For Server 70
P0922BK CRT MIW Top Mounting Plate, Sony GDM-5402
P0922BQ DCS FBM, WRO09C
P0922CH Series 70 Memory Upgrade Kit: 128 Mb, ECC RDRAM
P0922CJ Series 70 Memory Upgrade Kit: 256 Mb, ECC RDRAM
P0922CK Kit: 18 Gb Hard Drive For P95*B Terminal Server
P0922CQ Dual-Video IF Card Upgrade Kit For Server 70
P0922CR Quad-Video IF Card Upgrade Kit For Server 70
P0922CU 21" TS Monitor, Beige, Northern Hemisphere
P0922CV 21" TS Monitor, Gray, Northern Hemisphere
P0922CW 21" MIW TS Monitor, Beige, Northern Hemisphere
P0922CX 21" MIW TS Monitor, Gray, Northern Hemisphere
P0922CY 21" TS Monitor, Beige, Southern Hemisphere
P0922CZ 21" TS Monitor, Gray, Southern Hemisphere
P0922DA 21" MIW TS Monitor, Beige, Southern Hemisphere
P0922DB 21" MIW TS Monitor, Gray, Southern Hemisphere
P0922DD Print Cartridge For HP3000 Printer, Black
P0922DR DCS FBM, WRO09D
P0922ED Keyboard, Video, Trackball 100 Ft PC Cable Kit
P0922ET Series 70 Trackball w/Top Switches w/PS2 Connector
P0922EU Series 51 Trackball w/Top Switches w/DIN Connector
P0922FM PS/2 Keyboard/Mouse Set for P93/P95 Processors
P0922FN Spare Black Mouse For P93 & P95 Processors
P0922JC Kit: TR5 EIDE, Black Face, Backup Tape Drive
P0922JE Kit: Dual Head Video AGP Card For Model 93 Proc.
P0922JL Kit: 256 Mb, ECC Memory For Model P93 Processors
P0922JN Kit: 512 Mb, ECC Memory For Model P93 Processors
P0922JU Kit: 2 Gb Memory For Model P95*B Terminal Server
P0922JX Kit: TR5 SCSI, Black Face, Backup Tape Drive
P0922JY Kit:
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