Vehicle head unit and method of operating the same

1. A method of operating a vehicle head unit including a processor executing an application related to a connectivity service, the method comprising:

determining, by the processor, whether a current frame of video stream data transmitted from a user terminal corresponds to a black screen based on at least one line included in the current frame;

determining, by the processor, whether the black screen continues for a predetermined time upon determining that the current frame corresponds to the black screen; and

notifying, by the processor, that the user terminal needs to be re-connected or re-executed upon determining that the black screen continues for the predetermined time.

2. The method according to claim 1 , wherein the determining whether the current frame corresponds to the black screen comprises determining whether all pixels belonging to lines included in a first area in which content is displayed are black.

3. The method according to claim 1 , wherein the determining whether the current frame corresponds to the black screen comprises determining whether all pixels belonging to lines included in a second area in which menu icons are displayed are a same color.

4. The method according to claim 1 , wherein the determining whether the current frame corresponds to the black screen is periodically performed according to a timer expiration signal of a detecting period timer.

5. The method according to claim 1 , wherein the determining whether the black screen continues for the predetermined time comprises:

increasing a counter value of a detecting counter by a specific value; and

determining whether the increased counter value equals a threshold value.

6. The method according to claim 1 , wherein the notifying that the user terminal needs to be re-connected or re-executed comprises:

outputting a pop-up window through a display; and

outputting a warning sound through a speaker.

7. A vehicle head unit configured to execute an application related to a connectivity service, the vehicle head unit comprising:

a processor configured to store, in an analysis buffer, data corresponding to a current frame of video stream data transmitted from a user terminal, configured to determine whether the current frame corresponds to a black screen based on at least one line included in the current frame with reference to the analysis buffer, configured to determine whether the black screen continues for a predetermined time upon determining that the current frame corresponds to the black screen, and configured to notify that the user terminal needs to be re-connected or re-executed upon determining that the black screen continues for the predetermined time.

8. The vehicle head unit according to claim 7 , wherein the processor is configured to determine whether all pixels belonging to lines included in a first area in which content is displayed are black.

9. The vehicle head unit according to claim 7 , wherein the processor is configured to determine whether all pixels belonging to lines included in a second area in which menu icons are displayed are a same color.

10. The vehicle head unit according to claim 7 , wherein the processor is configured to periodically store the data corresponding to the current frame in the analysis buffer according to a timer expiration signal of a detecting period timer.

11. The vehicle head unit according to claim 7 , wherein the processor is configured to increase a counter value of a detecting counter by a specific value and determine whether the increased counter value equals a threshold value.

12. The vehicle head unit according to claim 7 , wherein the processor is configured to control a pop-up window to be output through a display and control a warning sound to be output through a speaker.

13. The vehicle head unit according to claim 7 , wherein the storing and the determining are performed in different threads in a central processing unit (CPU) of the vehicle head unit.

14. A vehicle head unit configured to execute an application related to a connectivity service, the vehicle head unit comprising:

a processor configured to periodically store, in an analysis buffer, data corresponding to a current frame of video stream data transmitted from a user terminal according to a timer expiration signal of a detecting period timer, determine whether the current frame corresponds to a black screen and whether the black screen continues for a predetermined time based on sample data included in the current frame with reference to the analysis buffer, and notify that the user terminal needs to be re-connected or re-executed upon determining that the black screen continues for the predetermined time.

15. The vehicle head unit according to claim 14 , wherein a black screen detecting logic executed by the processor is deactivated to enter a sleep mode upon determining that the current frame does not correspond to the black screen.

16. The vehicle head unit according to claim 14 , wherein a black screen detecting logic executed by the processor increases a counter value of a detecting counter by a specific value and is deactivated to enter a sleep mode upon determining that the black screen does not continue for the predetermined time.

17. The vehicle head unit according to claim 14 , wherein the processor is configured to determine whether all pixels belonging to lines included in a first area in which content is displayed are black.

18. The vehicle head unit according to claim 14 , wherein the processor is configured to determine whether all pixels belonging to lines included in a second area in which menu icons are displayed are a same color.