Báo cáo hóa học: " Improved Bit Rate Control for Real-Time MPEG Watermarking" doc

... watermarking. Essentially, our proposed bit rate control scheme com- pares the total number of bits (bit length) of two buffers: Improved Bit Rate Control for Real-Time MPEG Watermarking 2135 VLC1 VLC2 ... output for flower.mpg with multiplicative watermark (α = 100%) and different bit rate control schemes. 4. CONCLUSIONS In this paper, we present a novel bit rate...

Ngày tải lên: 23/06/2014, 01:20

... smooth sending rate is of importance. There are rate control mechanisms for example, the TCP Friendly Rate Control (TFRC) [15]—more suitable for this kind of applications. In terms of bit rate adjustment ... quality oscillation occurs due to the rate controller approach used to compute the allowed (target) bit rate. The test tool only tries to reach this target bit ra...

Ngày tải lên: 21/06/2014, 18:20

... to the aver- age bit error probability, in some cases, the c omplexity to compute this expression can be prohibitive. For this reason,wefoundaveryaccurateapproximationforthe bit error probability ... well as act as a cooperative agent for another user [4], [5]. The first implementation strategy for cooperation was introduced in [1], [6], where the achievable rate region, outage pr...

Ngày tải lên: 20/06/2014, 22:20

... v τ . 3 The control model The goal of the control module is to generate the necessary control signals to accelerate and decelerate the robot such that the performed rhythm matches the performance ... freely for any purposes (see copyright notice below). For information about publishing your research in EURASIP ASMP go to http://asmp.eurasipjournals.com/authors/instructions/ For in...

Ngày tải lên: 21/06/2014, 17:20

... ex- plicit iterate scheme (27). End. Z. Hongmei and W. Mingxi 7 Table 1: Comparison of segmentation results by improved Mumford-Shah functional and by MS functional. IMS: improved Mumford-Shah functional; ... coupled curve evo- lution. 3. IMPROVED MUMFORD-SHAH FUNCTIONAL In order to perform edge-preserving regularization and segmentation simultaneously, we present an improved Mumford-...

Ngày tải lên: 22/06/2014, 23:20

... group for single-hop versus multihop communications. With d char , multihop forwarding always outperforms single-hop communications but, for example, n anoMAC single-hop commu- nications outperform ... listening for the SYNC in S-MAC, decreases the energy performance of a sen- sor MAC. Binary exponential backoff causing nodes to lis- ten for the channel for the duration of the conten...

Ngày tải lên: 23/06/2014, 00:20

... CBR bit- rate control, the video quality varies periodically [7]. In Figure 3, the average PSNR using the proposed rate- control scheme is 34.77 dB while it is 33.36 dB for the case of no -rate control. Thus, ... constant. 5.2. Performance evaluation of the rate- control scheme To demonstrate the effectiveness of our proposed rate- control scheme, we use a representative drop...

Ngày tải lên: 23/06/2014, 00:20

... layer bitstream of a frame. FGS en- hancement layer bitstream consists of bits of all the bit planes of this frame. The most significant bit plane (MSB plane) is coded before the less significant bit ... valid subset. For exam- ple, if the segment that consists of the parity bits for the base layer video bitstream is selected, the segment that consists of the bits of the base layer vi...

Ngày tải lên: 23/06/2014, 01:20

... subsequently an accurate measure of scale, had been found for locating the mouth. Improved Facial-Feature Detection for AVSP 265 Video sequence Face scale found? yes? no? Generate face search area Detect ... space. ThesameGMMtopologieswerefoundtobeeffective for both mouth and e ye detection. In all cases, classifiers were trained using images from shot 1 of the M2VTS database with testi...

Ngày tải lên: 23/06/2014, 01:20

... SERs achieved by both the suboptimum strategy (26) and the optimum strategy (14)versusφ ,for = 0.9andfordifferent values of N f (N f = 4, 6); moreover, for each point of Figure 3, the constellation ... reports the SER achieved by both the suboptimum strategy and the optimum strategy versus φ for SNR = 18 dB and N f = 15. The optimum strategy provides performance gain over the non- adaptiv...

Ngày tải lên: 21/06/2014, 08:20