youtanqingfeng的博客

NI关于嵌入式发展的一份展望性的文档，非常有参考价值，可以感觉到嵌入式行业的脉搏。

大牛Simon Haykin写的关于神经网络的权威教材，属于原版英文教材，读起来更流畅，更方便理解。

Introduction When ITU-R BT.601, formally CCIR-601, was developed (which defined the YCbCr color space, the 4:2:2 YCbCr sampling organization, and sampling resolutions), it was soonfollowedbyITU-RBT.656(formallyCCIR-656). BT.656definedtheparallelandserialinterfacesfortransmitting 4:2:2YCbCrdigitalvideobetweenequipmentinstudio and pro-video applications. Active video resolutions are either 720 x 486 (525/60 video systems) or 720 x 576 (625/50videosystems). TheBT.656parallelinterfaceuses8or10bitsofmultiplexed YCbCrdataanda27MHzclock(ECLlevelsareusedforthe dataand clock signals). Insteadof theconventional video timing signals (HSYNC, VSYNC, and BLANK) also being transmitted, BT.656 uses unique timing codes embedded withinthevideostream.Thisreducesthenumberofwires (andICpins)requiredforaBT.656videointerface. Ancillarydigitalinformation(suchasaudio,closedcaptioning, andteletext)mayalsobetransmittedduringtheblanking intervals.Thiseliminatestheneedforaseparateaudio interfaceandadditionalcontrolsignals.