What is the DCIF Resolution?
After study,we found a more effective encoding resolution (DCIF)of surveillance video, the pixel is 528 × 384. DCIF resolution of the video image origin is the odd and even of two HALF D1, anti-interlaced by the transformation, the formation of a D1 (720 * 576), D1 for the boundary treatment, into a 4CIF (704 × 576), 4CIF by level 3 / 4, narrow, vertical 2 / 3 narrowed into a 528 × 384.528 × 384 pixels CIF number is just twice the number of pixels, and often said to 2CIF (704 * 288) distinction, we call DOUBLE CIF, referred to as DCIF. Obviously, DCIF in the horizontal and vertical directions, more balanced than Half D1.
Digital surveillance industry make two demands for digital surveillance products . first ,the low amount of data required to ensure the system can be a long and stable real-time video for network transmission; followed by high-definition playback images required to meet the requirements of the details. The DCIF resolution in the current hardware and software platform, can well meet the above two requirements. Half D1 resolution have been adopted to some products to solve the CIF resolution is not high enough and D1 high storage capacity, high cost etc. shortcomings. However, relative to CIF ,it is just horizontal resolution enhancement , image quality improvement is not particularly obvious, but stream significant added.
After testing a large number of video signals, based on the current video compression algorithms, DCIF resolution is better than Half D1 regarding the CIF is not high enough definition and DI high storage capacity, high price etc. the shortcomings.DCIF is used to solve the CIF and 4CIF, especially between 512Kbps bit rate, can get a stable high-quality images to meet user demands for higher image quality for video coding provides a better choice.
CIF resolution is not high enough and DI high storage capacity, high cost etc. the shortcomings , static playback resolution can be up to 360TVline theory for image quality, more than the standard analog monitor images VHS video tape recorders 280TVline level, can meet video standard definition secondary and tertiary requirements of the project in the Ministry of Public Security Industry, and also meet the requirements of most video surveillance.