missmimi 0 Posted December 20, 2009 Hi everyone, What is Full D1 compression? Is is very powerful? Thanks.. Share this post Link to post Share on other sites
thewireguys 3 Posted December 20, 2009 D1 is a resolution. 704x576 (TV PAL) 704x480 (TV NTSC) MJpeg, Mpeg-4 and h.264 are compressions. Share this post Link to post Share on other sites
survtech 0 Posted December 20, 2009 (edited) Or... 720x480 (NTSC) 720x576 (PAL) In analog, a full screen width is 720 pixels but that includes the horizontal blanking bar. The actual displayed area is 704 pixels. Edited December 21, 2009 by Guest Share this post Link to post Share on other sites
missmimi 0 Posted December 26, 2009 Oh.. I see.. Thanks everyone! As for compression, does it mean that an MJPEG compression shows playback in the form of pictures instead of realtime video like in H.264? Share this post Link to post Share on other sites
survtech 0 Posted December 26, 2009 Yes, M-JPEG is basically a series of JPEG still images. It is still real-time and can run as many frames per second as a streaming codec. h.264, MPEG-2, MPEG-4, h.263 and others are streaming codecs. Most of the streaming codecs do have the capability of acting just like M-JPEG if their compression is set for I-frame only (vs. IP, IBP, etc.). I-frames are also basically complete JPEG images and B-frames and P-frames are predictive frames that don't contain all picture information. Share this post Link to post Share on other sites
missmimi 0 Posted January 3, 2010 Yes, M-JPEG is basically a series of JPEG still images. It is still real-time and can run as many frames per second as a streaming codec. h.264, MPEG-2, MPEG-4, h.263 and others are streaming codecs. Most of the streaming codecs do have the capability of acting just like M-JPEG if their compression is set for I-frame only (vs. IP, IBP, etc.). I-frames are also basically complete JPEG images and B-frames and P-frames are predictive frames that don't contain all picture information. Thanks survtech! Share this post Link to post Share on other sites
tesc_cctvpro 0 Posted January 10, 2010 Given the 704 full screen width - many erroneously categorize their DVR's as D1, when they are actually 4CIF. Just a technicality, but one to be aware of in certain cases. Share this post Link to post Share on other sites
missmimi 0 Posted January 10, 2010 Given the 704 full screen width - many erroneously categorize their DVR's as D1, when they are actually 4CIF. Just a technicality, but one to be aware of in certain cases. Oh, I see.. Thanks for the advice tesc_cctvpro ! Share this post Link to post Share on other sites
