Abstract: In an information processing apparatus for transmitting information to and/or receiving the same from another information processing apparatus via radio communication, the information transmitted from a transmitting node is received by a receiving node, and a bit error rate of the information is counted by an error correction decoder. A host processor recognizes the communication quality on the basis of the bit error rate thus counted. The host processor controls the transmission output level of a transmitting amplifier or controls the modulation mode of a modulator in accordance with the recognized communication quality, whereby the communication quality in such radio communication can be exactly grasped to consequently realize satisfactory communication with a stable quality.

Abstract: An audio visual information signal reproducing apparatus reproduces an audio visual information signal from a recording medium, the audio visual information signal being recorded on the recording medium and composed of a video signal and a digitized audio signal being time-division multiplexed in such a way that the frame interval of the video signal does not accord with the frame interval of the digitized audio signal. The apparatus sets an audio output mute flag of a control code contained in the digitized audio signal of the audio visual information signal being reproduced and shifts to a next operation mode when a normal play mode is interrupted.