Controlling a video content system by adjusting the compression parameters
A method of controlling a video content system can include: obtaining a current input frame and a preceding input frame from an input video sequence and obtaining a current degraded frame and a preceding degraded frame from a degraded video sequence corresponding to the input video sequence; computing a first differences value from the current input and the preceding input frames and a second differences value from the current degraded frame and the preceding degraded frame, comparing the first and second differences values, giving rise to an inter-frame, quality score; computing an intra-frame quality score using an intra-frame quality measure that is applied in the pixel-domain of the current degraded frame and the current input frame and providing a configuration instruction to the video content system based on a quality criterion related to the inter-frame and the intra-frame quality scores.
1. A computerized method of controlling a video content system based on an input video sequence, the input video sequence including a current input frame, a preceding input frame and one or more subsequent input frames, the method comprising:
obtaining the current input frame, the preceding input frame, a candidate compressed frame corresponding to the current input frame, and a preceding compressed frame corresponding to the preceding input frame;
computing a first difference value from the current input frame and the preceding input frame and a second difference value from the candidate compressed frame and the preceding compressed frame;
comparing the first difference value and the second difference value giving rise to an inter-frame quality score;
computing an intra-frame quality score using an intra-frame quality measure that is applied in the pixel-domain of the candidate compressed frame and the current input frame;
evaluating quality of the candidate compressed frame using a quality criterion related to the inter-frame quality score and the intra-frame quality score;
determining a compression configuration for compressing at least one of the subsequent input frames based on result of the evaluation; and
providing the compression configuration to the video content system for performing compression of the at least one of the subsequent input frames,
wherein the compression configuration comprises one or more compression parameters selected from a group comprising quantization parameter, bit allocation, frame type, prediction mode, and setting of an in-loop deblocking filter, and
wherein the determining a compression configuration comprises adjusting one or more of the compression parameters in the quality criterion is not satisfied.
2. The computerized method of claim 1 , wherein said adjusting comprises increasing the bit allocation for the at least one of the subsequent input frames if quality of the candidate compressed frame is below a predetermined target quality.
3. The computerized method of claim 1 , wherein said adjusting comprises decreasing the bit allocation for the at least one of the subsequent input frames if quality of the candidate compressed frame exceeds a predetermined target quality.
4. The computerized method of claim 1 , wherein said adjusting comprises decreasing the quantization parameter for the at least one of the subsequent input frames if quality of the candidate compressed frame is below a predetermined target quality.
5. The computerized method of claim 1 , wherein said adjusting comprises increasing the quantization parameter for the at least one of the subsequent input frames if quality of the candidate compressed frame exceeds a predetermined target quality.
6. A computerized system of controlling a video content system based on an input video sequence, the input video sequence including a current input frame, a preceding input frame and one or more subsequent input frames, the system comprising a processor operatively connected to a memory and an I/O interface, wherein:
the I/O interface is configured to obtain the current input frame, the preceding input frame, a candidate compressed frame corresponding to the current input frame, and a preceding compressed frame corresponding to the preceding input frame; and
the processor is configured to:
compute a first difference value from the current input frame and the preceding input frame and a second difference value from the candidate compressed frame and the preceding compressed frame;
compare the first difference value and the second difference value giving rise to an inter-frame quality score;
compute an intra-frame quality score using an intra-frame quality measure that is applied in the pixel-domain of the candidate compressed frame and the current input frame;
evaluate quality of the candidate compressed frame using a quality criterion related to the inter-frame quality score and the intra-frame quality score;
determine a compression configuration for compressing at least one of the subsequent input frames based on result of the evaluation; and
wherein the I/O interface is further configured to provide the compression configuration to the video content system for performing compression of the at least one of the subsequent input frames,
wherein the compression configuration comprises one or more compression parameters selected from a group comprising quantization parameter, bit allocation, frame type, prediction mode, and setting of an in-loop deblocking filter, and
wherein the processor is configured to determine a compression configuration by adjusting one or more of the compression parameters in case the quality criterion is not satisfied.
7. The computerized system of claim 6 , wherein said adjusting comprises increasing the bit allocation for the at least one of the subsequent input frames if quality of the candidate compressed frame is below a predetermined target quality.
8. The computerized system of claim 6 , wherein said adjusting comprises decreasing the bit allocation for the at least one of the subsequent input frames if quality of the candidate compressed frame exceeds a predetermined target quality.
9. The computerized system of claim 6 , wherein said adjusting comprises decreasing the quantization parameter for the at least one of the subsequent input frames if quality of the candidate compressed frame is below a predetermined target quality.
10. The computerized system of claim 6 , wherein said adjusting comprises increasing the quantization parameter for the at least one of the subsequent input frames if quality of the candidate compressed frame exceeds a predetermined target quality.
11. A non-transitory computer readable medium, tangibly embodying a program of instructions that, when executed by a computer, cause the computer to perform a method of controlling a video content system based on an input video sequence, the input video sequence including a current input frame, a preceding input frame and one or more subsequent input frames, the method comprising:
obtaining the current input frame, the preceding input frame, a candidate compressed frame corresponding to the current input frame, and a preceding compressed frame corresponding to the preceding input frame;
computing a first difference value from the current input frame and the preceding input frame and a second difference value from the candidate compressed frame and the preceding compressed frame;
comparing the first difference value and the second difference value giving rise to an inter-frame quality score;
computing an intra-frame quality score using an intra-frame quality measure that is applied in the pixel-domain of the candidate compressed frame and the current input frame;
evaluating quality of the candidate compressed frame using a quality criterion related to the inter-frame quality score and the intra-frame quality score;
determining a compression configuration for compressing at least one of the subsequent input frames based on result of the evaluation; and
providing the compression configuration to the video content system for performing compression of the at least one of the subsequent input frames,
wherein the compression configuration comprises one or more compression parameters selected from a group comprising quantization parameter, bit allocation, frame type, prediction mode, and setting of an in-loop deblocking filter, and
wherein the processor is configured to determine a compression configuration by adjusting one or more of the compression parameters in case the quality criterion is not satisfied.
12. The non-transitory computer readable medium of claim 11 , wherein said adjusting comprises increasing the bit allocation for the at least one of the subsequent input frames if quality of the candidate compressed frame is below a predetermined target quality.
13. The non-transitory computer readable medium of claim 11 , wherein said adjusting comprises decreasing the bit allocation for the at least one of the subsequent input frames if quality of the candidate compressed frame exceeds a predetermined target quality.
14. The non-transitory computer readable medium of claim 11 , wherein said adjusting comprises decreasing the quantization parameter for the at least one of the subsequent input frames if quality of the candidate compressed frame is below a predetermined target quality.
15. The non-transitory computer readable medium of claim 11 , wherein said adjusting comprises increasing the quantization parameter for the at least one of the subsequent input frames if quality of the candidate compressed frame exceeds a predetermined target quality.