Adjustable partial distortion search algorithm for fast block motion estimation
نویسندگان
چکیده
The quality control for video coding usually absents from many traditional fast block motion estimators. In this letter, a novel block-matching algorithm for fast motion estimation named the adjustable partial distortion search algorithm (APDS) is proposed. It is a new normalized partial distortion comparison method capable of adjusting the prediction accuracy against searching speed by a quality factor . With adjustability, APDS could act as the normalized partial distortion search algorithm (NPDS) when is equal to 0, and the conventional partial distortion search algorithm (PDS) when is equal to 1. In addition, it uses halfway-stop technique with progressive partial distortions (PPD) to increase early rejection rate of impossible candidate motion vectors at very early stages. Simulations with PPD reduce computations up to 38 times with less than 0.50-dB degradation in PSNR performance, as compared to the full-search algorithm (FS). Experimental results show that APDS could provide peak signal-to-noise ratio performance very close to that of FS with speedup ratios of 7 to 16 times, and close to that of NPDS from 22 to 32 times, respectively, as compared to FS.
منابع مشابه
Adaptive search area for fast motion estimation
In this paper a new method for determining the search area for motion estimation algorithm based on block matching is suggested. In the proposed method the search area is adaptively found for each block of a frame. This search area is similar to that of the full search (FS) algorithm but smaller for most blocks of a frame. Therefore, the proposed algorithm is analogous to FS in terms of reg...
متن کاملGeneralized partial distortion search algorithm for fast block motion estimation
The quality against speed control for real-time video applications, such as the speed-oriented video conferencing or the high quality video entertainment, usually absents from many traditional fast block motion estimators. In this paper, a novel block-matching algorithm for fast motion estimation named generalized partial distortion search algorithm (GPDS) is proposed. It uses halfway-stop tech...
متن کاملFast Overlapped Block Motion Estimation for Frame Rate Up Conversion
In this paper, we propose a fast motion estimation algorithm to be used for motion-compensated frame rate up conversion (FRUC). The FRUC techniques are used to enhance the visual quality of the low frame rate video on display. By using the motion vectors obtained from motion estimation process, the new frames can be interpolated. The motion estimation is the key part of the FRUC process but it ...
متن کاملNormalized partial distortion search algorithm for block motion estimation
Many fast block-matching algorithms reduce computations by limiting the number of checking points. They can achieve high computation reduction, but often result in relatively higher matching error compared with the full-search algorithm. In this letter, a novel fast block-matching algorithm named normalized partial distortion search is proposed. The proposed algorithm reduces computations by us...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- IEEE Trans. Circuits Syst. Video Techn.
دوره 13 شماره
صفحات -
تاریخ انتشار 2003