Digital video system and control method threreof

A method of controlling a digital video system comprising a transmitter that wirelessly outputs a wirelessly transmitted signal to be transmitted, and a receiver that wirelessly communicates with the transmitter, and processes the signal received from the transmitter, the method comprising the steps of:

• the receiver, checking a transmission error rate of a packet of the wirelessly transmitted signal received from the transmitter;
• transmitting a down-adjustment request signal to the:
• transmitter with respect to a grade of the wirelessly transmitted signal when the transmission error rate is greater than a reference value, and when the wirelessly transmitted signal can be adjusted down to a grade lower than the resolution grade of the video signal;
• and
• the transmitter, receiving the down-adjustment request signal, converting the wirelessly transmitted signal to be transmitted into a format that corresponds to a revised signal having a grade lower than the resolution grade of the wirelessly transmitted signal, and transmitting the converted signal to the receiver.

A computer readable medium containing instructions for controlling a video display system, said instructions comprising:

• checking a transmission error rate of a packet of the signal received from the transmitter;
• transmitting a down-adjustment request signal to the transmitter with respect to a grade of the signal when the transmission error rate is greater than a reference value, and when the signal can be adjusted down to a grade lower than the resolution grade of the received signal;
• and
• receiving the down-adjustment request signal, converting the signal to be transmitted into a format that corresponds to a revised signal having a grade lower than the resolution grade of the signal, and transmitting the converted signal to the receiver.