11.11 Configure the settings relating to audio [Audio]
Click the [Audio] tab on the “Image/Audio” page. (→9.1 How to display the setup menu, 9.2 How to operate the setup menu)
The settings relating to audio can be configured on this page.
Note
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Images and audio will not be synchronized. Therefore, images and audio may not always match.
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Audio may be interrupted depending on the network environment.
[Audio transmission/reception]
Select the communication mode used for audio data transmission/reception between the camera and the PC from the following.
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Off: Does not receive/transmit audio between the camera and the PC. Therefore, the settings and controls relating to audio will be invalidated.
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Mic input: The PC receives audio data from the camera. Audio can be heard with images on the PC. Images and audio will not be synchronized.
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Audio output: Audio data from the PC will be transmitted to the camera. Audio can be heard from the speaker connected to the camera.
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Interactive(Half-duplex): Both reception and transmission are available. However, audio data cannot simultaneously be transmitted and received.
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Interactive(Full-duplex): Both reception and transmission are simultaneously available.
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Default: Off
Note
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Howling may be generated depending on usage conditions. If howling is generated, prevent sound generated by the PC from entering the PC microphone.
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When “Multicast” is selected for “Transmission type” on the [JPEG/H.264] tab of the “Image/Audio” page, audio transmission will become unavailable while monitoring H.264 images. To transmit audio from a PC to the camera, click the [JPEG] button on the “Live” page.
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“Audio recording” and “Audio detection” only operate when “Mic input” or “Interactive(Full-duplex)” is selected for “Audio transmission/reception”.
[Audio encoding format]
Select the audio reception encoding format from G.726, G.711, AAC-LC and AAC-LC(HIGH QUALITY).
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Default: G.726
Note
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G.711 is available only when “Mic input” is selected for “Audio transmission/reception”.
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G.726 is always applied for the audio transmission encoding format.
[Audio bit rate]
Select the audio bit rate used to transmit/receive audio data.
When G.726 is selected for “Audio encoding format” : 16kbps/ 32kbps
When AAC-LC(HIGH QUALITY) is selected for “Audio encoding format” : 64kbps/ 96kbps/ 128kbps
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Default: 32kbps
IMPORTANT
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When “AAC-LC(HIGH QUALITY)” is selected, there are limitations about the following function.
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“SD memory card” is not available.
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“Audio detection” is not available.
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HTTPS is not available.
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The maximum concurrent access number is limited to 5.
Note
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When selecting a smaller value for “Bandwidth control(bit rate)” (→16.1 Configure the network settings [Network]) while putting a priority on the JPEG image transmission, select “16kbps” for “Audio bit rate”.
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[Audio bit rate] is unavailable when “G.711” or “AAC-LC” is selected for “Audio encoding format”.
[Mic input volume (Camera to PC)]
Select a volume level on the PC to hear audio transmitted from the camera.
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Mic High: The volume level will become high. This setting will be applied when audio is input to the camera using a microphone.
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Mic Middle: The volume level will become middle. This setting will be applied when audio is input to the camera using a microphone.
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Mic Low: The volume level will become low. This setting will be applied when audio is input to the camera using a microphone.
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Line High: The volume level will become high. This setting will be applied when audio is input to the camera using the Line input.
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Line Middle: The volume level will become middle. This setting will be applied when audio is input to the camera using the Line input.
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Line Low: The volume level will become low. This setting will be applied when audio is input to the camera using the Line input.
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Default: Mic Middle
Note
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These settings are linked with the volume settings of “Audio recording” and “Audio detection”.
[AGC(audio)]
Automatically adjusts the audio reception to a suitable volume. The degree to which the volume is adjusted can be selected from High/Middle/Low.
When “High” is selected, it is easier to hear quiet sounds, but sounds may be heard as noise. If you do not want to hear noise, select “Middle” or “Low”.
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Default: High
Note
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This setting is also applied to the volume for [Audio recording] and [Audio detection].
IMPORTANT
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If the [AGC(audio)] setting is changed after configuring [Audio detection], the volume of the sound that is detected with [Audio detection] may change. In this case, make sure to check the [Audio detection] setting.
[Mic input interval (Camera to PC)]
Select an interval for audio reception from the following.
20ms/ 40ms/ 80ms/ 160ms
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Default: 40ms
Note
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When a shorter interval is selected, the delay time will be shorter. When a longer interval is selected, audio interruption may be diminished even though the delay time will be longer. Select the interval according to the network environment.
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“Mic input interval (Camera to PC)” is unavailable when “AAC-LC” is selected for “Audio encoding format”.
[Audio output volume (PC to Camera)]
Select a volume level on the camera to hear audio transmitted from the PC.
High/ Middle/ Low
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Default: Middle
[Audio output interval (PC to Camera)]
Select an interval for audio transmission from the following.
160ms/ 320ms/ 640ms/ 1280ms
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Default: 640ms
Note
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When a shorter interval is selected, the delay time will be shorter. When a longer interval is selected, audio interruption may be diminished even though the delay time will be longer. Select the interval according to the network environment.
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Audio may temporarily be interrupted and noise may be heard when multiple users are accessing the camera concurrently. It may be possible to diminish the interruption or noise by setting a longer interval for “Audio output interval (PC to Camera)”.
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Audio may sometimes not be heard depending on the network environment.
[Audio output duration]
Configure the maximum duration for each time audio is outputted.
1min/ 2min/ 3min/ 5min/ 10min/ 20min/ 30min/ 1h
Default: 5min
Note
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Audio output stops when the specified time has passed. To turn the audio transmission function on, click the Audio output button again.
[Audio output port (PC to Camera)]
Enter the transmission port number (the port number on the camera used to receive audio data transmitted from the PC).
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Available port number: 1024-50000 (Only even numbers are available.)
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Default: 34004
Note
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The transmission port number entered for “Audio output port (PC to Camera)” will be used only when “Unicast port (MANUAL)” is selected for “Transmission type” (→11.3 Configure the settings relating to H.264 images [JPEG/H.264]).
When “Off” is selected for “H.264 transmission” (→11.3 Configure the settings relating to H.264 images [JPEG/H.264]) or when “Unicast port (AUTO)” or “Multicast” is selected for “Transmission type”, it is not necessary to enter the transmission port number.
[Permission level of audio trans./recep.]
Select an access level for audio transmission/reception from the following.
1. Level 1 only/ 2. Level 2 or higher/ 3. All users
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Default: 3. All users
Note
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Refer to Section 15 Configure the settings relating to the authentication [User mng.] for further information about the access level.