In English
Sensoray 2253 /2253s Внешний модуль видеозахвата и аппаратный кодек H.264 / MPEG-4 / MJPEG с интерфейсом USB, -40~+85C
Sensoray 2253
Особенности
Одновременное кодирование/декодирование видеопотка в надёжном компактном устройстве
Несжетое + сжатое оцифрованное видео на выходе от одного видеовхода
Малые задержки на предварительном просмотре
Видеокомпрессия H.264 HP@L3, MPEG-4 ASP, MJPEG
Аудиокомпрессия AAC, G.711, несжатый формат PCM
Наложение текста
Два цифровых входа-выхода общего назначения
Корпусный и бескорпусный варианты модуля
Доступна версия для индустриального температурного диапазона
Руководство по программному обеспечению для Linux (англ.), PDF
Руководство по программному обеспечению для Windows (англ.), PDF
SDK и драйверы для Linux , tar.bz
SDK и драйверы для Windows , ZIP)
Sensoray 2253 - стандартный бескорпусный вариант кодека
Sensoray 2253s - вариант кодека 2253 в корпусе
Упрощенная диаграмма потоков данных модуля 2253
Description
Model 2253 is a compact and robust USB-compatible audio/video codec that is powered from a single USB port. Its small size (1.5" x 2.75") and low power consumption (1.5 Watts) make it ideal for both portable and embedded applications.
Encoder
The unit is capable of simultaneously producing two different video streams from its single composite input and sending the streams out over USB. One of the streams can be a low-latency uncompressed stream (useful for real time previewing) and the other compressed, or both streams may be compressed. Image resolution is independently configurable for each stream, as well as compression type and bit rate in the case of compressed streams.
Video and audio are available as elementary streams or may be multiplexed in MP4 container format.
Up to 1024 bytes of application-supplied data may be inserted in the H.264 or MPEG stream, at a specified frame interval or single shot.
Audio
The 2253 implements hardware-generated timestamps to keep audio synchronized to the video, thus eliminating "lip sync" problems.
Text Overlay
Up to 80 characters of overlay text may be positioned anywhere in the video frame prior to compression.
Digital I/O
One general purpose digital input and one output are provided. The output is optically isolated, while the input may be either optically isolated or galvanically coupled. The input is sampled every millisecond and, when a state change is detected, a notification is sent to the application program.
Image Overlay
Overlay images can be displayed on top of the composite video output. The overlayed video may be sourced from either the composite video input or a decoded compressed stream. Image formats supported are Windows bitmap (BMP) and Portable Network Graphics (PNG), with 24 or 32 bits per pixel. Overlays support 7 transparancy levels.
Example of the 2253 overlay capabilities (captured from 2253 composite output)
Decoder
The 2253 can also perform as a decoder, converting a USB-supplied compressed audio/video stream into standard analog video and audio signals. (Decoding is guaranteed only for streams captured with the 2253). The following formats are supported for decoding: MPEG-4 (.m4v), H.264 (.264 or .h264), MP4 (.mp4) and MJPEG (.mjpg or .mjpeg).
Ultra-low latency preview
Model 2253 supports an ultra-low latency preview mode for real-time applications. When capturing in native resolution (704x480 for NTSC or 704x576 for PAL) this mode reduces the overall latency by approximately one frame time.
2253 Latency
Packaging Options
Model 2253S features a sturdy metal enclosure with video, audio, USB and GPIO connectors
Also available: Model 2253 is a bare-board version of Model 2253S for OEM applications
Specifications
Inputs Video: NTSC/PAL composite, 75 Ohm;
Audio: line stereo, microphone mono.
Outputs Video: NTSC/PAL composite, 75 Ohm;
Audio: line stereo
Encoding format Video: H.264 HP@L3, MPEG-4 ASP, JPEG;
Audio: G.711, AAC
Output stream format Elementary audio/video, MPEG-4 program stream (.MP4), MJPEG AVI
Video preview format 640x480@ 30 fps (NTSC); 720x576@25 fps (PAL); YUV4:2:2, GREY8, or JPEG
Text Overlay Up to 80 characters for full resolution images
Video Overlay (upcoming SDK) Windows BMP and PNB with 24 or 32 bits/pixel
8-bit red, blue, green and 8-bit transparency channel
Interface USB 2.0 High-speed
Power consumption <1.5 W (300 mA @ 5 V) from USB port
Operating temperature 0 to 70 C (-40 - +85 C version available)
Dimensions 2253: 2.755" x 1.5"
2253S: 5.14" x 3.28" x 1.14"
