Tham khảo tài liệu 'biomedical engineering 2012 part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 232 Biomedical Engineering diagnosis. Again all video qualities qualified for urgent clinical practice however QPs of 44 36 28 is recommended. The same allegations stand for constant QP encoding whereas for rate control similar to CIF resolution videos attaining PSNR higher than db. a b Fig. 5. Rate-distortion curves for tested frame encoding schemes. a QCIF and b CIF. a b c d Fig. 6. Rate-distortion curves for tested frame encoding schemes QCIF resolution. a 2 b 5 c 8 and d 10 loss rates. IBBPBBP encoding scheme attains higher PSNR ratings in most cases especially in low-noise up to 5 scenarios. Towards Diagnostically Robust Medical Ultrasound Video Streaming using 233 c d Fig. 7. Rate-distortion curves for tested frame encoding schemes CIF resolution. a 2 b 5 c 8 and d 10 loss rates. Bi-directional prediction IBPBP and IBBPBBP achieves better results up to 5 loss rates low-noise whereas as the noise level increases single -directional IPPP provides for better error recovery. a Fig. 8. Rate-distortion curves for a entire video QCIF resolution with ECG lead and b atherosclerotic plaque extracted from QCIF resolution video with ECG lead diagnostic ROI . Observe that Variable QP FMO encoding attains inferior quality for the whole video when it comes to diagnostic quality however it outperforms rate control encoding while it achieves similar PSNR ratings with constant QP encoding the key observation being the drastically lower bitrate it involves. b
