Image processing frequency managing method and image processing system

1 . An image processing frequency managing method, applied to an electronic device comprising an image processing device, comprising:

(a) monitoring a reception speed of image data, which is received by the electronic device; and

(b) adjusting an image processing frequency of the image processing device according to the reception speed;

wherein the step (a) monitors a queuing speed of an input buffer receiving an image data stream to acquire the reception speed;

wherein the step (b) comprises:

ignoring the image processing frequencies which are first N computed image processing frequencies, wherein N is a positive integer that the N computed image processing frequencies correspond to a preload stage of the input buffer.

2 . The image processing frequency managing method of claim 1 , wherein the image processing device is an image coding device, wherein the image processing frequency is one of following frequencies: an image encoding frequency, an image decoding frequency, a frequency for image encoding and decoding.

3 . The image processing frequency managing method of claim 1 ,

wherein the step (b) comprises:

computing a second operating rate according to the reception speed, while the image processing device operates at a first operating rate, wherein the second operating rate is periodically updated every first time interval, and a target second operating rate is determined by a maximum one of a previously updated second operating rate before the first time interval and the second operating rate that is currently updated;

replacing the first operating rate with the target second operating rate if a difference between the previously updated second operating rate before the first time interval and the second operating rate that is currently updated is smaller than a first difference threshold;

wherein the target second operating rate is for adjusting an image processing frequency.

4 . The image processing frequency managing method of claim 3 ,

wherein the step (b) comprises:

replacing the first operating rate with the target second operating rate if a difference between the first operating rate and the target second operating rate is larger than a second difference threshold; and

computing the image processing frequency of the image processing device according to the first operating rate.

5 . The image processing frequency managing method of claim 1 , further comprising:

acquiring a pre-defined op rate from an operating system of the electronic device;

monitors a queuing speed of an input buffer receiving an image data stream, to generate an average op rate;

replacing the pre-defined op rate by the average op rate according to a comparison of a plurality of op rates comprising the average op rate, to adjust the image processing frequency.

6 . An image processing system, comprising:

an image processing device;

a processing circuit, configured to perform following steps:

(a) monitoring a reception speed of image data, which is received by the electronic device; and

(b) adjusting an image processing frequency of the image processing device according to the reception speed;

wherein the image system further comprises an input buffer, wherein the step (a) monitors a queuing speed of the input buffer receiving an image data stream to acquire the reception speed;

wherein the step (b) comprises:

ignoring the image processing frequencies which are first N computed image processing frequencies, wherein N is a positive integer that the N computed image processing frequencies correspond to a preload stage of the input buffer.

7 . The image processing system of claim 6 , wherein the image processing device is an image coding device, wherein the image processing frequency is one of following frequencies: an image encoding frequency, an image decoding frequency, a frequency for image encoding and decoding.

8 . The image processing system of claim 6 ,

wherein the step (b) comprises:

computing a second operating rate according to the reception speed, while the image processing device operates at a first operating rate, wherein the second operating rate is periodically updated every first time interval, and a target second operating rate is determined by a maximum one of a previously updated second operating rate before the first time interval and the second operating rate that is currently updated;

replacing the first operating rate with the target second operating rate if a difference between the previously updated second operating rate before the first time interval and the second operating rate that is currently updated is smaller than a first difference threshold;

wherein the target second operating rate is for adjusting an image processing frequency.

9 . The image processing system of claim 6 ,

wherein the step (b) comprises:

replacing the first operating rate with the target second operating rate if a difference between the first operating rate and the target second operating rate is larger than a second difference threshold; and

computing the image processing frequency of the image processing device according to the first operating rate.

10 . The image processing system of claim 6 , wherein the processing circuit is further to perform:

acquiring a pre-defined op rate from an operating system of the electronic device;

monitoring a queuing speed of an input buffer receiving an image data stream, to generate an average op rate;

replacing the pre-defined op rate by the average op rate according to a comparison of a plurality of op rates comprising the average op rate, to adjust the image processing frequency.