Axis 223M User Manual

Also see for AXIS 223M: Specifications Product guide Installation guide Hoja de datos User manual

AXIS 223M - Audio17AudioThe AXIS 223M can transmit audio to other clients using a connected external microphone and can play audioreceived from other clients via connected speakers. This section describes how to configure the basic audiosettings for the AXIS 223M, e.g. set the communication mode and adjust the sound levels in the microphone andspeakers connected to the camera.Note: The speakers connected to the audio output must have a built-in amplifier, e.g.PC speakers.Audio Settings - Enable AudioCheck this box to enable audio in the AXIS 223M.Audio Channels - Audio modeHalf-duplex mode transmits and receives audio in both directions,but only in one direction at a time. This means that you must selectwhen to receive or transmit audio with the push-to-talk button. Tospeak, press and hold the button (check that the microphone is notmuted). When finished speaking, release the button and you willreceive audio from the other end of the connection.Note that the push-to-talk button is configured from AMC. It is also possible to configure the push-to-talkbutton so that it toggles between speaking and listening modes.When selecting Simplex - Network Camera speaker only mode, the speaker connected to the camera will playaudio, but no audio will be transmitted from the camera to other web clients. This could be used to e.g. providespoken instructions to a person seen in the camera. This mode requires you to use the push-to-talk button.Simplex - Network Camera microphone only mode transmits audio only from the AXIS 223M to web clients. Itwill not receive audio from any other web clients. This can be used in remote monitoring, web attractions etc.,to provide live audio, as well as video, of a monitored situation.When using half-duplex, the Send the sound from the active client to all other clients option transmits theaudio signal from the client that is talking to all the other clients.Audio InputAudio from a connected microphone or a line source can be connected to the Audio in connector of the AXIS223M. The audio source must be set to Microphone or Line depending on the connected device.The Enable microphone power option provides DC power for an external microphone. If using a small electretcondenser microphone such as a clip-on mic or a PC microphone, this option needs to be enabled.Note: To use a high impedance dynamic microphone, DC power should not be enabled. DC power will not harm the microphone, but if you areuncertain, try switching it off and on. The default value is DC power enabled. To use a professional microphone requiring 48V phantompower, you need an external power supply and must use a balanced-unbalanced converter (audio transformer) in between.If there are problems with the sound input being too low or high, adjust the input gain for the microphoneconnected to the AXIS 223M.Select the desired audio Encoding format, AAC, G711, G726.Select the desired Sample rate (the number of samples of a sound that are taken per second). The settingsdepend on the available bandwidth and the required audio quality, i.e. 16kHz produces better sound but requiresmore bandwidth.Depending on the selected encoding, set the desired Bit rate (audio quality). The settings depend on theavailable bandwidth and the required audio quality, i.e. a high bit rate setting requires more bandwidth.Client PCTCP/IP NetworkExample of a networkusing AXIS 223M cameras to transmitaudio and video across the network.