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Limited memory bandwidth system and method for dynamically limiting memory bandwidth

A technology of dynamic limitation and memory, which is applied in the direction of image communication, selective content distribution, electrical components, etc., can solve the problems of performance degradation of audio-visual decoders and graphics processors, limited total bandwidth of memory, and unfixed bandwidth of memory, etc. Achieve the effect of maintaining the effect of video and audio playback

Active Publication Date: 2021-12-28
REALTEK SEMICON CORP
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  • Application Information

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Problems solved by technology

And the memory bandwidth required by the graphics processor to process the video control adjustment function is not fixed
However, the total memory bandwidth of the SoC is limited, so when the memory bandwidth required by the AV decoder and the memory bandwidth required by the graphics processor are large, the performance of the AV decoder and the graphics processor will decrease

Method used

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  • Limited memory bandwidth system and method for dynamically limiting memory bandwidth
  • Limited memory bandwidth system and method for dynamically limiting memory bandwidth
  • Limited memory bandwidth system and method for dynamically limiting memory bandwidth

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Embodiment Construction

[0013] refer to figure 1 , the limited memory bandwidth system 10 may include a bus 110 , a CPU 120 , a graphics processor 130 , an audio / video decoder 140 and a memory controller 150 . The CPU 120 , the graphics processor 130 , the audio / video decoder 140 and the memory controller 150 are respectively coupled to the bus 110 and communicate with each other (eg, exchange data and / or control information) through the bus 110 . Wherein, the limited memory bandwidth system 10 may be, for example, a system on chip (SoC).

[0014] In one embodiment, the memory controller 150 may be coupled to one or more memories 20 external to the limited memory bandwidth system 10 . The memory controller 150 can control the data access to the memory 20 by various components in the limited memory bandwidth system 10 (such as the central processing unit 120 , the graphics processor 130 , the video and audio decoder 140 , etc.). For example, generally speaking, when any component wants to access the...

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Abstract

The invention relates to a limited memory bandwidth system and a method for dynamically limiting memory bandwidth. The method for dynamically limiting memory bandwidth of a graphics processor is suitable for a system with limited memory bandwidth. The limited memory bandwidth system includes an audio-visual decoder and a graphics processor. The method includes: detecting a plurality of decoding times for an audio-video decoder to decode a plurality of frames of an audio-video file, and adjusting the upper limit of memory bandwidth permission of the graphics processor according to the decoding times of the plurality of frames and the target time. Therefore, when the total amount of memory bandwidth is limited, the memory bandwidth of the graphics processor is limited by the performance of the corresponding audio-visual decoder, so as to avoid affecting the audio-visual playback effect and provide better graphics during the audio-visual playback process. User Interface.

Description

technical field [0001] The invention relates to a memory bandwidth allocation technology in a limited memory bandwidth system, in particular to a limited memory bandwidth system and a method for dynamically limiting memory bandwidth of a graphics processor. Background technique [0002] Nowadays, system on chip (SoC) is widely used in TV, set-top box (setup box, STB), smart TV box (over the top box, ott box), personal computer (personal computer, PC), mobile phone (mobile phone), tablet PC (tablet PC), video player (DVD player) and other electronic devices. [0003] The system single chip has video and audio decoding function and visual control adjustment function (on screen display, OSD). On the SoC, the video control adjustment function is performed by a graphics processing unit (GPU). Moreover, the memory bandwidth required by the audio-video decoder to decode audio-video will vary with the size of the audio-video content. The memory bandwidth required by the graphics ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/433H04N21/4402H04N21/442
CPCH04N21/4402H04N21/44204H04N21/433
Inventor 曾逸晨曾明扬
Owner REALTEK SEMICON CORP