Wireless media device and image display device provided with same

A wireless media device comprising:

• a signal processing device configured to process an image signal or an audio signal;
• and
• a transceiver configured to wirelessly transmit a signal from the signal processing device to an external display device,
• wherein the transceiver is configured to
• transmit, to the display device, a data frame including a preamble and media data through at least one transmission channel among a plurality of channels,
• in response to a level of an interference signal being equal to or higher than a reference level during a first interval of a data transfer period of transmitting the media data to the display device, not perform data transmission in the first interval, and
• in response to an interference signal existing during a second interval of the data transfer period and the level of the interference signal being lower than the reference level,
• control a sequence of the data frame of the transmission channel, and a sequence of a data frame of a channel adjacent to the transmission channel to be orthogonal to each other.

An image display apparatus comprising:

• a display device;
• and
• a wireless media device,
• wherein the wireless media device comprises:
• a signal processing device configured to process an image signal or an audio signal;
• and
• a transceiver configured to wirelessly transmit a signal from the signal processing device to an external display device,
• wherein the transceiver is configured to
• transmit, to the display device, a data frame including a preamble, a header, and media data through at least one transmission channel among a plurality of channels,
• in response to a level of an interference signal being equal to or higher than a reference level during a first interval of a data transfer period of transmitting the media data to the display device, not perform data transmission in the first interval, and
• in response to an interference signal existing during a second interval of the data transfer period and the level of the interference signal being lower than the reference level, control a preamble of a channel adjacent to the transmission channel, and a preamble of the transmissions channel to be orthogonal to each other.