Method for media rate control in a video encoding system

• US 9,549,189 B2
• Filed: 11/06/2012
• Issued: 01/17/2017
• Est. Priority Date: 11/06/2012
• Status: Active Grant

• Current Assignee: Ittiam Systems Pte Ltd
• Original Assignee: Ittiam Systems Pte Ltd
• Inventors: Matcha, Chaitanya Kumar, Laveti, Durga Venkatanarayanababu, Gupta, Puneet, Kundu, Swapan Kumar, Gopalakrishna Rao, Bhavani
• Primary Examiner(s): Atala, Jamie
• Assistant Examiner(s): Hansell, Jr., Richard A
• Application Number:
  US13/669,490
• Publication Number:
  US 20140126626A1
• Time in Patent Office: 1,533 Days
• Field of Search: 375/240.02, 375/E07.126, 375/E07.226
• US Class Current: 1/1
• CPC Class Codes: H04N 19/115 Selection of the code volume for a coding unit prior to coding
• CPC Class Codes: H04N 19/154 Measured or subjectively estimated visual quality after decoding, e.g. measurement of distortion use of rate-distortion criteria H04N19/147
• CPC Class Codes: H04N 19/196 being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters processing of motion vectors H04N19/513

Abstract

A method for media rate control in a video encoding system disclosed. In one embodiment, an optimal remaining one of the three parameter sets (Sk) is computed based on the provided user configuration inputs of two parameters sets (Si, Sj), wherein the user configuration inputs comprise two parameter sets (Si and Sj) out of three parameter sets (Si, Sj, and Sk), wherein the three parameter sets are latency parameter set, channel bandwidth parameter set, and video quality parameter set. The video encoding system is then configured based on the provided two parameter sets (Si, Sj) and the computed parameter set (Sk) to obtain a desired media rate control having optimal performance.

Claims

1. A method for media rate control in a video encoding system, comprising:

providing user configuration inputs, wherein the user configuration inputs comprise two parameter sets (Si and Sj) out of three parameter sets (Si, Sj, and Sk), wherein the three parameter sets are latency parameter set, channel bandwidth parameter set, and video quality parameter set, and wherein the parameter set Si is the latency parameter set;

computing an optimal remaining one of the three parameter sets (Sk) based on the provided two parameters sets (Si, Sj), wherein computing the optimal remaining one of the three parameter sets (Sk) comprises one of;

computing the channel bandwidth parameter set using the provided latency parameter set and the provided video quality parameter set as inputs; and

computing the video quality parameter set using the provided latency parameter set and the provided channel bandwidth parameter set as inputs, wherein the latency parameter set comprises an average latency in video frame durations (L_avg) and a peak instantaneous latency in video frame durations (L_peak), wherein the channel bandwidth parameter set comprises an available channel bandwidth (BW_chan), and wherein the video quality parameter set comprises an average encoder output bit rate (BR_enc), a VBV buffer allowance in terms of number of average encoded video frame size that is based on an average encode bit rate and an encoded video frame rate (N_vbv), and ratio between maximum allowed encoded video frame size and average encoded video frame size (R_max); and

configuring the video encoding system based on the provided two parameter sets (Si, Sj) and the computed parameter set (Sk) for a desired media rate control having optimal performance.

2. The method of claim 1, wherein configuring the video encoding system based on the provided two parameter sets (Si, Sj) and the computed parameter set (Sk) comprises:

computing video encode parameters (VEPs) and system management parameters (SMPs) based on the provided user configuration inputs including the two of the three parameter sets (Si and Sj) and the computed remaining one of the three parameter sets (Sk); and

configuring the video encoding system based on the computed VEPs and SMPs to obtain the media rate control.

4. The method of claim 2, further comprising:

configuring a video processing module using the VEPs; and

further configuring a video encoding pipeline using the SMPs to obtain the desired media rate control.

3. A method for media rate control in a video encoding system, comprising:

providing user configuration inputs, wherein the user configuration inputs comprise two parameter sets (Si and Sj) out of three parameter sets (Si, Sj, and Sk), wherein the three parameter sets are latency parameter set, channel bandwidth parameter set, and video quality parameter set;

computing an optimal remaining one of the three parameter sets (Sk) based on the provided two parameters sets (Si, Sj), wherein the remaining one of the three parameter sets based on the provided two of the three parameter sets is computed using the following mathematical model;

5. A video encoding system, comprising:

processor; and

memory operatively coupled to the processor, wherein the memory comprising a video encoding configuration module configured to;

provide user configuration inputs, wherein the user configuration inputs comprise two parameter sets (Si and Sj) out of three parameter sets (Si, Sj, and Sk), wherein the three parameter sets are latency parameter set, channel bandwidth parameter set, and video quality parameter set, and wherein the parameter set Si is the latency parameter set;

compute a remaining one of the three parameter sets (Sk) based on the provided two parameters sets (Si, Sj), wherein computing the remaining one of the three parameter sets (Sk) comprises one of;

computing the channel bandwidth parameter set using the provided latency parameter set and the provided video quality parameter set as inputs; and

computing the video quality parameter set using the provided latency parameter set and the provided channel bandwidth parameter set as inputs, wherein the latency parameter set comprises an average latency in video frame durations (L_avg) and a peak instantaneous latency in video frame durations (L_peak), wherein the channel bandwidth parameter set comprises an available channel bandwidth (BW_chan), and wherein the video quality parameter set comprises an average encoder output bit rate (BR_enc), a VBV buffer allowance in terms of number of average encoded video frame size that is based on an average encode bit rate and an encoded video frame rate (N_vbv), and ratio between maximum allowed encoded video frame size and average encoded video frame size (R_max); and

configure the video encoding system based on the provided two parameter sets (Si, Sj) and the computed parameter set (Sk) to obtain a desired media rate control.

6. The system of claim 5, wherein the video encoding configuration module is further configured to:

compute video encode parameters (VEPs) and system management parameters (SMPs) based on the provided user configuration inputs including the two of the three parameter sets (Si and Sj) and the computed remaining one of the three parameter sets (Sk); and

configure the video encoding system based on the computed VEPs and SMPs to obtain the media rate control.

8. The system of claim 5, wherein the memory further comprising:

an encoder configuration module and a video encode processing module in a video encoding pipeline, wherein the encoder configuration module to configure the video processing module using the VEPs; and

a buffer and queue management module and a thread module for further configuring the video encoding pipeline using the SMPs to obtain the desired media rate control.

7. A video encoding system, comprising:

processor, and

memory operatively coupled to the processor, wherein the memory comprising a video encoding configuration module configured to;

provide user configuration inputs, wherein the user configuration inputs comprise two parameter sets (Si and Sj) out of three parameter sets (Si, Sj, and Sk), wherein the three parameter sets are latency parameter set, channel bandwidth parameter set, and video quality parameter set;

compute a remaining one of the three parameter sets (Sk) based on the provided two parameters sets (Si, Sj), wherein the remaining one of the three parameter sets based on the provided two of the three parameter sets is computed using the following mathematical model;

9. A non-transitory computer-readable storage medium for media rate control in a video encoding system, when executed by a computing device, cause the computing device to:

provide user configuration inputs, wherein the user configuration inputs comprise two parameter sets (Si and Sj) out of three parameter sets (Si, Sj, and Sk), wherein the three parameter sets are latency parameter set, channel bandwidth parameter set, and video quality parameter set, and wherein the parameter set Si is the latency parameter set;

compute a remaining one of the three parameter sets (Sk) based on the provided two parameters sets (Si, Sj), wherein computing the remaining one of the three parameter sets (Sk) comprises one of;

computing the channel bandwidth parameter set using the provided latency parameter set and the provided video quality parameter set as inputs; and

computing the video quality parameter set using the provided latency parameter set and the provided channel bandwidth parameter set as inputs, wherein the latency parameter set comprises an average latency in video frame durations (L_avg) and a peak instantaneous latency in video frame durations (L_peak), wherein the channel bandwidth parameter set comprises an available channel bandwidth (BW_chan), and wherein the video quality parameter set comprises an average encoder output bit rate (BR_enc), a VBV buffer allowance in terms of number of average encoded video frame size that is based on an average encode bit rate and an encoded video frame rate (N_vbv), and ratio between maximum allowed encoded video frame size and average encoded video frame size (R_max); and

configure the video encoding system based on the provided two parameter sets (Si, Sj) and the computed parameter set (Sk) to obtain a desired media rate control.

10. The non-transitory computer-readable storage medium of claim 9, configure the video encoding system based on the provided two parameter sets (Si, Sj) and the computed parameter set (Sk) to obtain a desired media rate control comprises:

computing video encode parameters (VEPs) and system management parameters (SMPs) based on the provided user configuration inputs including the two of the three parameter sets (Si and Sj) and the computed remaining one of the three parameter sets (Sk); and

configuring the video encoding system based on the computed VEPs and SMPs to obtain the media rate control.

11. A non-transitory computer-readable storage medium for media rate control in video encoding system, when executed by a computing device, cause the computing device to:

provide user configuration inputs, wherein the user configuration inputs comprise two parameter sets (Si and Sj) out of three parameter sets (Si, Sj, and Sk), wherein the three parameter sets are latency parameter set, channel bandwidth parameter set, and video quality parameter set;

compute a remaining one of the three parameter sets (Sk) based on the provided two parameters sets (Si, Sj), wherein the remaining one of the three parameter sets based on the provided two of the three parameter sets is computed using the following mathematical model;