Recovery circuit and an image processing apparatus for detecting and recovering an abnormal signal
A recovery circuit including: a first circuit configured to detect an abnormal signal based on an input signal and mask a signal subsequent to the abnormal signal when the input signal is detected as the abnormal signal; a second circuit configured to receive the abnormal signal from the first circuit, generate a fake signal in response to the abnormal signal, and transmit the fake signal to a processor; and a third circuit configured to generate a control signal and transmit the control signal to the processor; wherein the processor ignores the abnormal signal and performs an image processing operation based on the fake signal in response to the control signal.
1 . A recovery circuit comprising:
a first circuit configured to detect an abnormal signal based on an input signal and mask a signal subsequent to the abnormal signal when the input signal is detected as the abnormal signal;
a second circuit configured to receive the abnormal signal from the first circuit, to generate a fake signal in response to the abnormal signal, and to transmit the fake signal to a processor; and
a third circuit configured to generate a control signal and transmit the control signal to the processor, the control signal comprising a first interrupting signal indicating detection of the abnormal signal and a second interrupting signal indicating termination of the fake signal;
wherein the processor performs an image processing operation based on the fake signal in response to the first interrupting signal, and controls the first circuit to receive the signal subsequent to the abnormal signal that was masked by the first circuit in response to the second interrupting signal.
2 . The recovery circuit of claim 1 , wherein the input signal comprises a frame signal including a plurality of frame sections, a line signal including at least one line section, and a pixel signal including at least one pixel section,
wherein the first circuit is further configured to check each of the plurality of frame sections for the abnormal signal,
and wherein the signal subsequent to the abnormal signal comprises a frame section subsequent to a frame section detected by the first circuit to include the abnormal signal.
3 . The recovery circuit of claim 2 , wherein the first circuit is further configured to detect that the input signal is the abnormal signal when a number of line sections corresponding to one frame section among the plurality of frame sections is less than or greater than a threshold number of line sections corresponding to the one frame section.
4 . The recovery circuit of claim 2 , wherein the first circuit is further configured to detect that the input signal is the abnormal signal when a data amount of the pixel section corresponding to the line section is less than or greater than a threshold data amount of the pixel section corresponding to the line section.
5 . The recovery circuit of claim 2 , wherein the first circuit is further configured to detect that the input signal is the abnormal signal when an interval between line sections corresponding to one frame section of the plurality of frame sections is shorter or longer than a threshold interval between line sections corresponding to the one frame section.
6 . The recovery circuit of claim 2 , wherein the first circuit is further configured to detect that the input signal is the abnormal signal when there is neither a line section nor a pixel section corresponding to one frame section of the plurality of frame sections, or when there is the line section or the pixel section between the frame sections.
7 . The recovery circuit of claim 2 , wherein the second circuit includes a register for storing data including a threshold number of line sections corresponding to each of the plurality of frame sections, a threshold interval between the line sections, and a threshold data amount of the pixel section,
and wherein the fake signal comprises a frame section generated based on data stored in the register corresponding to a particular frame section when the first circuit detects the particular frame section as the abnormal signal.
8 . The recovery circuit of claim 1 , further comprising a fourth circuit configured to receive the fake signal from the second circuit, generate a renewed fake signal in response to the fake signal, and transmit the renewed fake signal to the processor.
9 . The recovery circuit of claim 1 , wherein the first circuit is further configured to operate in a first mode or in a second mode,
wherein when the input signal is detected as the abnormal signal, the first circuit operates in the first mode, and
when the input signal is not detected as the abnormal signal, the first circuit operates in the second mode, and transmits the input signal to the processor.
10 . A method of operating an image processing apparatus including an image sensor, the method comprising:
receiving, by a recovery circuit, an input signal including a plurality of frame sections from the image sensor and detecting an abnormal signal in a first frame section of the input signal;
masking, by the recovery circuit, a second frame section of the input signal when the abnormal signal is detected in the first frame section;
generating, by the recovery circuit, a fake signal corresponding to the first frame section;
generating, by the recovery circuit, a first interrupting signal indicating detection of the abnormal signal;
generating, by a processor, an output image based on the fake signal in response to the first interrupting signal; and
generating, by the recovery circuit, a second interrupting signal indicating termination of the fake signal;
wherein the processor ignores the first frame section and performs an image processing operation based on the fake signal in response to the first interrupting signal, and controls the recovery circuit to receive the second frame section in response to the second interrupting signal.
11 . The method of claim 10 , wherein the method further comprises ignoring, by the processor, the first frame section, in response to the first interrupting signal.
12 . The method of claim 10 , wherein the first frame section is detected as the abnormal signal when a number of line sections corresponding to the first frame section is less than or greater than a threshold number of line sections that correspond to the first frame section.
13 . The method of claim 10 , wherein the method further comprises generating a renewed fake signal in response to the fake signal and generating the output image in response to the renewed fake signal.
14 . The method of claim 10 , further comprising generating the output image based on the first frame section when the abnormal signal is not detected.
15 . An image processing apparatus comprising:
an image sensor configured to generate image data including a plurality of frame sections;
a recovery circuit configured to receive the image data from the image sensor and generate output data based on the image data; and
a processor configured to generate an output image based on the output data;
wherein the recovery circuit includes a first circuit configured to detect an abnormal signal based on a first frame section of the image data and mask a second frame section subsequent to the first frame section when the first frame section is detected as the abnormal signal;
a second circuit configured to receive the first frame section from the first circuit and generate a fake signal based on the first frame section; and
a third circuit configured to generate a control signal, the control signal comprising a first interrupting signal indicating detection of the abnormal signal and a second interrupting signal indicating termination of the fake signal;
wherein the processor ignores the first frame section and performs an image processing operation based on the fake signal in response to the first interrupting signal, and controls the first circuit to receive the second frame section in response to the second interrupting signal,
wherein the output data includes the first frame section, the fake signal, and the control signal.
16 . The image processing apparatus of claim 15 , wherein the image data further comprises a line signal including at least one line section and a pixel signal including at least one pixel section,
wherein the first circuit is further configured to detect the first frame section as the abnormal signal when there is neither a line section nor a pixel section corresponding to the first frame section.
17 . The image processing apparatus of claim 15 , further comprising a fourth circuit configured to receive the fake signal from the second circuit, generate a renewed fake signal based on the fake signal, and transmit the renewed fake signal to the processor,
wherein the output data further includes the renewed fake signal.
18 . The image processing apparatus of claim 15 , wherein the first circuit is further configured to operate in a first mode or in a second mode,
wherein when the first frame section is detected as the abnormal signal, the first circuit operates in the first mode,
wherein when the first frame section is not detected as the abnormal signal, the first circuit operates in the second mode and receives the second frame section, and
wherein the processor is further configured to generate the output image based on the first frame section.