We implemented the proposed algorithm in HM15.0 [4] of H.265/HEVC reference software and compared it with TZ Search in terms of computations (search speed measured by total encoding time and ME time) and performance (PSNR and bit rate). Average Speedup is defined as the ratio of the time of TZ search algorithm to the proposed algorithm.
Test conditions [8] for simulation are as follows:
1. Four different quantization parameters (QP=22, 27, 32, 37) to test the algorithm at different bit rates.
2. Encoder_ lowdelay_main configuration and main profile (Bit Depth=8) has been used.
3. Search range is set to 64.
The simulation platform is a PC with OS type Ubuntu14.04 LTS (64 bit), Processor: Intel CoreTM i7-4790 CPU @3.60GHz. The uncompressed test sequences used for simulation are standard test sequences [9] recommended by JCT-VC. Class A test sequences are not applicable for encoder_lowdelay_main configuration. List of test sequences used for simulation are as follows …show more content…
Test Sequences
Class Test Sequence
Class B BQTerrace_1920X1080
Class C BQMall_832X480
Class D BlowingBubbles_416X240
Class E Johnny_1280X720
To calculate the computational efficiency of proposed algorithm total time saving and ME time saving measures are used. PSNR Gain and increase in Bit Rate are the performance quality measures
These are calculated as follows:
Time Saving = (16)
PSNR Loss = TZ PSNR – Proposed PSNR (17)
Bit Rate Increase=
Test conditions [8] for simulation are as follows:
1. Four different quantization parameters (QP=22, 27, 32, 37) to test the algorithm at different bit rates.
2. Encoder_ lowdelay_main configuration and main profile (Bit Depth=8) has been used.
3. Search range is set to 64.
The simulation platform is a PC with OS type Ubuntu14.04 LTS (64 bit), Processor: Intel CoreTM i7-4790 CPU @3.60GHz. The uncompressed test sequences used for simulation are standard test sequences [9] recommended by JCT-VC. Class A test sequences are not applicable for encoder_lowdelay_main configuration. List of test sequences used for simulation are as follows …show more content…
Test Sequences
Class Test Sequence
Class B BQTerrace_1920X1080
Class C BQMall_832X480
Class D BlowingBubbles_416X240
Class E Johnny_1280X720
To calculate the computational efficiency of proposed algorithm total time saving and ME time saving measures are used. PSNR Gain and increase in Bit Rate are the performance quality measures
These are calculated as follows:
Time Saving = (16)
PSNR Loss = TZ PSNR – Proposed PSNR (17)
Bit Rate Increase=