Abstract
This paper presents an implementation of a fast two-dimensional inverse discrete cosine transform (IDCT) with multimedia instructions for a software MPEG-2 decoder. IDCT algorithms for sparse blocks which eliminate the calculation for zero coefficients are realized by using multimedia instructions. To reduce the cycle count for IDCT, an adaptive control method for these IDCT algorithms, based on the bit rate and picture type, is proposed and its performance is described. In the implementation of a software MPEG-2 decoder, the execution time for IDCT is reduced to 10% by using MMX instructions from the original C program. Moreover, using the proposed adaptive control, it can further be reduced to 76%.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
