AMX NMX-ENC-1100 Instruction Manual page 30

Encoding Options (Cont.)
Video Profile
GOP Size
Video Burst Size
Video Codec
Frame Decimation
Audio Format
Audio Sampling Rate
Audio Codec
Audio Bitrate (kbps)
IMPORTANT: The detected resolution for a source stream from an SPX model XPress Player must be 720x480p@60Hz. The source
must be SD.
IMPORTANT: The detected resolution for a source stream from a touch panel must be no higher than 1280x720p@60Hz. You must
also set the Frame Decimation to 1/2.
Instruction Manual - NMX-ENC H.264 Encoder
Select the encoding profile. The profile defines the subset of H.264 encoding techniques that will be
used during the encode process. Not all decoders support all profiles; therefore, it is important to select
a profile that is supported by all playback devices for a given application. You can choose from Baseline,
Main, or High. The default setting is High.
• The Baseline profile uses only a limited subset of encoding techniques, requiring less processing
power to decode, making it well suited for use with mobile devices.
• The Main profile uses most of the encoding techniques, which requires more processing power to
decode, making it well suited for use with set top boxes.
• The High profile uses almost all of the encoding techniques. It is designed for HD encoding and works
well with HD set top boxes and software decoders.
Select from the menu the Group of Pictures (GOP) size. GOP size determines the distance between two
full image frames (I-frames) in the encoded video. Larger GOP sizes result in greater compression
efficiency, but it takes longer for the video to recover from errors. You can choose from 15, 30, 60, 120,
or 240 frames. The default setting is 60.
The video burst size specifies a duration in which a collection of frames can be sent at a given moment.
The value you can select is in milliseconds. You can select from several values between 150ms and
2000ms. The default setting is 300ms.
Shows the video codec the encoder is using. This field is view-only.
Frame decimation reduces the number of input frames to increase the quality of the video image. When
you select a value, you are selecting a value which indicates the fraction by which you want to reduce the
input bit rate. You can choose from None, 1/2, 1/3, or 1/4. The default setting is None.
Select from the menu the type of audio source you want to encode. You can choose from Digital Audio,
Analog Audio, or No Audio. Digital Audio is only available if you select HDMI or SDI from the Video
Format menu. Selecting Analog Audio activates the Audio Sampling Rate option.
NOTE: Since the default video format is HDMI, the default audio format is digital. If you change the
video format to analog (VGA), the audio format automatically changes to analog audio. However, if
you switch from an analog video format to digital (HDMI), the audio format video format does not
automatically switch to digital.
Shows the audio sampling rate the encoder is using. This field is only available if you set the audio source
to Analog Audio and is view-only.
Shows the audio codec the encoder is using. This field is view-only.
Enter the target video bit rate for the encoded audio. Higher bit rates will result in higher quality encoded
audio.The options are in kilobytes per second (kbps). You can choose from 64, 96, 128, or 192 kbits. The
default setting is 128 kbits.
Web Configuration
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