H.264 Frext Technology and Its Application

I. Introduction In July 2004, JVT and completed H.264FRExt (ie: FidelityRangeExtensions) extension (Amendment) development work, including High profile (HP), High 10 profile (Hi10P), High 4: 2: 2 profile (Hi422P ), High 4: 4: 4 profile (Hi444P) 4 Ge profile. In addition, JVT in January 2005 to begin a partial hierarchical coding H.264 SVC standard-setting new expansion, scheduled for completion in late 2006. This paper describes the main technical points H.264 FRExt in its application. Today coding performance best international video coding standard H.264 to MPEG standards set under the ISO / IEC standard group and VCEG under the ITU-TSG16 set up a joint working group JVT developed, ITU called H.264, MPEG is called MPEG-4Part10, in addition may also be referred to as AVC, H.26L, JVT standard. JVT completed in May 2003, H.264 fundamental part of the standard-setting work, contains Baselineprofile, Extended profile and Main profile, include different coding tools, as shown in Table 1. Be Be Two, FRExt technical characteristics 1.FRExt4 a profile H.264Baselineprofile, Extendedprofile Main profile and sample data are for 8, 4: 2: 0 format video sequence, extending it to FRExt 8 to 12 sample data, the video format is 4: 2: 0,4: 2: 2 and 4: 4: 4, set up a High profile (HP), High 10 profile (Hi10P), High 4: 2: 2 profile (Hi422P), High 4: 4: 4 profile (Hi444P) 4 Ge profile, in all four profile based on Main profile, and to be gradually extended containment relationship, it contains coding tools and relationships shown in table 2. Be Be 2. Transform Since FRExt for high resolution video image, therefore, in order to get better coding efficiency, an increase in the FRExt in a 8% 8 integer transform method, the transformation matrix is: Be Be Calculation accuracy of (8 + n) bits, wherein the input video samples into n-bit precision. This conversion method can be quickly implemented by way of a butterfly, which is slightly more computational complexity than 4% 4 point transform in H.264, as shown in Table 3. Be Be In the encoding process, for each macroblock MB encoder selects a 4% 4% 8 8 conversion or conversion, however, for an inter macroblock, if 8% 8 sub-division manner (i.e., using 4% 8,8% 4 4,4% mode), the luminance component using 4% 4 transform; and for intra-macro block, if the luminance component is 8% 8 prediction method employed, the luminance component using 8% 8 transform method. Technology area 485 communication protocol program how to write (51 single-chip 485 communication program case) How to use 485 communication agreement (typical circuit instance of traditional photoelectric isolation) MODBUSRTU packet format detailed introduction Eight modbus RTU data frame formats detailed Modbus RTU Communication Protocol Format Detailed Description

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