Signal processing device and video display device comprising same
Disclosed are a signal processing device and an image display apparatus including the same. The signal processing device of an embodiment of the present disclosure includes: a quality calculator configured to calculate a source quality of an image signal received from an external settop box or a network; an image quality setter configured to set an image quality of the image signal based on the calculated source quality; and an image quality processor configured to perform image quality processing on the image signal based on the set image quality, wherein in response to the source quality of the received image signal being changed at a first time point, the image quality setter changes an image quality setting sequentially from a first setting to a second setting; and based on the image quality setting, the image quality processor performs image quality processing. Accordingly, flicker may be reduced when an image quality is changed due to a change in the source quality of the received image signal.
1. An image display apparatus comprising:
an image receiver configured to receive an image signal from an external settop box or a network;
a display; and
a processor configured to:
receive the image signal from the image receiver;
acquire a source quality of the image signal, wherein the acquired source quality of the image signal includes a noise level and a compression level of the received image signal;
change an intensity of the image signal, based on the compression level included in the acquired source quality of the image signal;
cause the display to display an image corresponding to the changed intensity of the image signal; and
cause the display to display:
a first object indicating the acquired source quality of the received image signal; and
a second object indicating an image quality.
2. The image display apparatus of claim 1 , wherein the intensity of the image signal includes an enhancement intensity of the image signal or a noise reduction intensity.
3. The image display apparatus of claim 1 , wherein the processor is further configured to:
change, during image playback, the image quality from a first image quality setting to a second image quality setting, in response to the source quality of the received image signal being changed at a first time point.
4. The image display apparatus of claim 1 , wherein the processor is further configured to:
change, while the image signal is received from the settop box, the image quality from a first image quality setting to a second image quality setting in response to the source quality of the received image signal being changed at a first time point by a channel change or an input change.
5. The image display apparatus of claim 1 , wherein the processor is further configured to:
extract a first region and a second region from the image signal;
acquire the noise level of the image signal based on the first region; and
acquire the noise level of the image signal based on the second region.
6. The image display apparatus of claim 5 , wherein the processor is further configured to:
extract a region, having most edge components in the image signal, as the first region; and
extract a region having fewest edge components in the image signal, as the second region.
7. The image display apparatus of claim 1 , wherein the processor is further configured to increase a noise reduction intensity of the image signal as the acquired noise level increases.
8. The image display apparatus of claim 1 , wherein the processor is further configured to acquire the noise level of the received image signal using a Deep Neural Network (DNN).
9. The image display apparatus of claim 1 , wherein the processor is further configured to:
update a parameter for a Deep Neural Network (DNN) received from a server; and
acquire the noise level and the compression level of the received image signal based on the updated parameter.
10. The image display apparatus of claim 1 , wherein the processor is further configured to:
acquire the compression level based on training data obtained by reducing a compression bit rate.
11. The image display apparatus of claim 1 , wherein the processor is further configured to:
decrease an enhancement intensity of the image signal as the acquired compression level increases.
12. The image display apparatus of claim 1 , wherein the processor is further configured to:
decrease an enhancement intensity of the image signal as the noise level of the image signal decreases.
13. The image display apparatus of claim 1 , wherein the processor is further configured to:
increase a blurring intensity of the image signal as the acquired compression level increases.
14. The image display apparatus of claim 1 , wherein the processor is further configured to:
decrease a size of a filter for filtering the image signal as the noise level of the image signal increases.
15. The image display apparatus of claim 1 , wherein the processor is further configured to:
downscale the image signal based on the noise level of the image signal;
perform image quality processing on the downscaled image signal;
upscale the image signal on which the image quality processing is performed; and
output the upscaled image signal.
16. An image display apparatus comprising:
an image receiver configured to receive an image signal from an external settop box or a network;
a display; and
a processor configured to:
receive the image signal from the image receiver;
acquire a source quality of the image signal, wherein the acquired source quality of the image signal includes an acquired noise level and an acquired compression level of the received image signal;
change an enhancement intensity of the image signal, based on the acquired noise level of the image signal;
cause the display to display an image corresponding to the changed enhancement intensity of the image signal; and
cause the display to display:
a first object indicating the acquired source quality of the received image signal; and
a second object indicating an image quality.
17. The image display apparatus of claim 16 , wherein the processor is further configured to:
cause the display to display the first object and the second object for a defined period of time, in response to the source quality of the received image signal being changed.
18. The image display apparatus of claim 16 , wherein the processor is further configured to:
change, while the image signal is received from the settop box, the image quality from a first image quality setting to a second image quality setting in response to the source quality of the received image signal being changed at a first time point by a channel change or an input change.
19. The image display apparatus of claim 16 , wherein the processor is further configured to:
acquire the noise level of the received image signal using a Deep Neural Network (DNN).