A Fast Block Size Decision For Intra Coding in HEVC Standard
- سال انتشار: 1397
- محل انتشار: مجله پیشرفت در تحقیقات کامپیوتری، دوره: 9، شماره: 2
- کد COI اختصاصی: JR_JACR-9-2_007
- زبان مقاله: انگلیسی
- تعداد مشاهده: 419
نویسندگان
Department of Computer Engineering, Mobarakeh Branch, Islamic Azad University, Mobarakeh, Isfahan, Iran
Department of Computer Engineering, Dolatabad Branch, Islamic Azad University, Isfahan, Iran
چکیده
Intra coding in High efficiency video coding (HEVC) can significantly improve the compression efficiency using 35 intra-prediction modes for 2N×2N (N is an integer number ranging from six to two) luma blocks. To find the luma block with the minimum rate-distortion, it must perform 11932 different rate-distortion cost calculations. Although this approach improves coding efficiency compared to the previous standards such as H.264/AVC, but computational complexity is increased significantly. In this paper, an intra-prediction technique has been described to improve the performance of the HEVC standard by minimizing its computational complexity. The proposed algorithm called prediction unit size decision (PUSD) was introduced to decrease evaluation of block sizes. The simulation results show that the time complexity is decreased by ~36% while the bit-rate is increased by 1.1 kbps, and PSNR is decreased by 0.6 db. Accordingly, the proposed algorithms have negligible effect on the video quality with great saving in the time complexity.کلیدواژه ها
block size decision, HEVC, Intra coding, Temporary direction map, Prediction unitاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.