User manual TRENDNET TV-PC100

[. . . ] A choice of high resolution sensor provides sharpest image quality, you will never too late to enjoy the pleasure of video applications in your PC with this PC camera. Following is a brief installation guide for user who run USB PC camera in Win98 environment for the first time. System requirement Pentium 133 or above CPU, Pentium II 350 recommended 32 MB of system RAM One USB port Microsoft Windows 98 20MB hard disk space Camera Diagram Snapshot Button Power LED Manual Focus Hardware installation Plug in the USB cable of PC camera into the USB port in your PC. The power LED indicator of camera will turn on after the USB host controller having initiated the USB device properly. Driver and software installation Please follow the steps to install the driver for USB PC Camera. A. Driver Installation A 3. 5" floppy diskette is included in the package. [. . . ] CCIR 601, a digital TV encoding standard, defines video digitized signal in YUV 4:4:4, or YUV 4:2:2 format. A corresponding driver in PC will decode and translate the data into correct color for splay. Digital camera is dedicated, but not limited, for PC applications today. The most popular interface today are parallel port and USB port. Image DSP - Image DSP is used to deal with the image and color captured and ensure sharpness of color displayed on monitor. Image DSP can control white balance, hue and saturation of RGB color, gamma value for color adjustment. Different algorithms are implemented in DSP to provide such functions. Some silicon suppliers has already integrate DSP together with image sensor as one-chip solution for cost-down reason, while others implement compression engine in image DSP to speed up the data transmission rate. Image quality - PC camera has to faithfully reflect and reproduce true color of observed object, any distortion of image or twisted of color will consider being poor image quality. Since the responses of human eyes to color are slightly different, some testing equipment and environment is necessary to accurately judge the image quality. Nevertheless, image sensor, lens and design method is the key factors of image quality. Another criteria of image quality is the sensitivity to environmental luminance, some PC camera can sense the image in dim condition for light source as low as 5 luxs, while others can respond in 10 luxs only. Lens - Lens is another critical component in PC camera that can affect the quality of image sensed. The focal length and viewing-angle of lens, associated with IR-cut and low-pass filter, will determine the picture quality sensed. The most popular lens used in PC camera market is 1/3", 1/4" and 1/5" lens, with 3. 6 ~ 6. 0 mm focal length each has their own advantages in different applications. To avoid distortion on edge of image, focal length above 4. 0 mm is recommended. Performance and resolution - The performance of PC camera is determined by frame size (resolution) and frame-per-second PC camera can handle. Frame size has certain standard for comparison, so-called SQCIF (160 x 120), QCIF (176 x 144), CIF (352 x 288) and VGA (640 x 480). Analog PC camera can transmit up to 30 frames/second at any resolution, which is almost the highest quality similar to the motion picture as you see in the cinema. Still 18 frames/second claims to be acceptable in digital PC camera, although some jerking image may occur and cause inconvenience for visual effect. The new USB or parallel port PC camera with compression technologies should be able to support up to 30 frame-per-second in CIF formats. Personal videoconferencing systemsystems are personal systems. A system designed to connect a single person into a teleconference. Most desktop video conferencing Frame rate- The number of images per second displayed in a video stream. Approximately 24 frames per second (fps) is considered full-motion video. POTS (Plain Old Telephone Service)- Conventional analog telephone service. ISDN (Integrated Services Digital Network) - A type of digital telephone service available in two speeds: 128-Kbps basic-rate interface (BRI) and 1. 54-Mbps primary-rate interface (PRI). H. 261- Leads the pack. H. 261 is the standard for video codecs, with the compressed video signal operating over one or more 64-kbps ISDN B-channels. H. 261 defines two picture or resolution structures that are compatible with all three worldwide television display formats. The picture structures are the Common Intermediate Format (CIF) and the Quarter Common Intermediate Format (QCIF). CIF is also referred to as "full CIF" (FCIF). H. 323- Standard that provides a gateway for LAN/WAN videoconferencing. Desktop video conferencing on the LAN must adjust to the constantly-changing available bandwidth. [. . . ] H. 324 is critical in delivering desktop videoconferencing products to the home and small office/home office (SOHO) market. QCIF (Quarter Common Intermediate Format)- A 176-by-144 video format defined by the ITU's H. 261 specification. CIF- Display paints 352 pixels per line and 288 lines per picture, normally displayed full-screen. VGA - Video Graphics Array, resolution is 640 x 480 pixels. SVGA - Super Video Graphics Array, resolution is 800 x 600 pixels. Twain - A standardized interfacing system that allows many different software applications to access many different image input devices. TWAIN compliance is needed for both software applications and imaging hardware devices (scanners, cameras) to be compatible. USB port - USB is the abbreviation for Universal Serial Interface, and is a new interface with throughput goes up to 12Mbps. It allows daisy-chained of 127 PC peripherals connection with 5 meters per device. [. . . ]