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CX25834 Datasheet(PDF) 3 Page - Synaptics Incorporated. |
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CX25834 Datasheet(HTML) 3 Page - Synaptics Incorporated. |
3 / 4 page master on a single device. Like the Bt848A, the Fusion family can place video data directly into host memory for video capture applications and into a target video display frame buffer for video overlay applications. Fusion Software Drivers Fusion offers a suite of widely fielded software drivers for Windows 95 and Windows 98. With the VxD drivers, board developers can support products using either the Windows 95 or Windows 98 operating systems. VxD and WDM drivers provide video capture, playback and display in accordance with Microsoft’s Video for Windows and Direct Show 2.0, respectively. Dialog boxes, tuner, GPIO, and I2C modules can be modified and customized by board developers. Fusion software drivers are supported by the industry’s broadest base of ISV applications commercially available for video editing, teleconferencing, compression, television on the PC and video email. Software is available through retail and OEM channels. Fusion 878A MPEG II All Format Decoder (optional) Bt869 (optional) Analog and Digital Tuner I2C Composite and S-Video OFDM DVB ATSC I2S CCIR 601 Analog Audio/Video in Digital Audio/ Video In GPIO Graphics Memory System Memory PCI BUS Disk Digital RGB Out Analog RGB/VGA What is a PCI Video Decoder? A PCI bus analog video decoder is used for three primary PC solutions: video capture and editing, video teleconferencing, and television receiver cards. A video signal is generated by a video source, which can be a camera,VCR or TV tuner. The baseband video that goes into the PCI decoder is a simple analog signal that contains video analog data and video synchronization data, which is used to display the picture properly at the receiving end. The details of the signal depend on the video standard used — NTSC (National Television Standards Committee), PAL (Phase Alternate Line) or SECAM (Systeme Electronique Couleur Avec Memoire). To transmit the picture, the source generates a vertical synchronization signal (VSYNC). This signal resets the receiver (PC monitor) so that it begins picture display at the top of the screen. After the VSYNC signal is sent, the video source scans the first line of the image. Once the scan line is complete, the camera generates a horizontal synchronization signal (HSYNC), which resets the receiver so that it will display the next line starting at the left-hand edge of the display. For each line of the image, a scan line and a horizontal synchronization pulse are sent. The PCI bus attached to the video decoder is the access mechanism, or hub, for this video information traveling to the PC. The need for broadcast data in the PC is a primary reason analog dedicated PC television receiver cards are becoming very popular. The introduction of WebTV for Windows and national broadcaster support of Vertical Blanking Interval (VBI) content contribute to addressing the need for a feature rich, broadcast data function in the PC. PCI video decoder solutions provide the most effective means to achieve this. Digital television receiver for the PC |
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