AMX NXD/NXT-1700VG, NXD/NXT-1500VG, NXD/NXT-1200VG Codec, Sampling Rate, and Audio Channels

Firmware Pages and Descriptions

Streaming Video Adjustment Page Elements (Cont.)

Audio:	This read-only field displays the audio streaming information (Audio Streaming
	format, sampling rate, and number of channels).
	• The properties of this incoming (detected) audio stream is given as: Audio
	Codec, Sampling Rate, and Audio Channels.
	• An example would be: MP3 44100Hz 2Ch. This means that the
	accompanying audio stream is using a 2 channel, MP3 audio stream with
	sampling rate of 44100 Hz.
Codec	Supported audio codecs: AAC, MP2 or MP3
(Short for enCOder/	• AAC (Advanced Audio Coding) is a digital audio encoding and loss
DECoder or COmpressor/
	compression format. AAC was designed as an improved-performance codec
DECompressor)
	relative to MP3 (which was specified in MPEG-1) and MPEG-2 Part 3 (which
	is also known as "MPEG-2 Audio" or ISO/IEC 13818-3).
	• MP2 (MPEG Audio Layer-2) is used as a file extension for files containing
	audio data of this type. It remains a dominant standard for audio
	broadcasting. This file type allows the coding of audio programs with more
	than two channels. The main difference between these two types is that MP2
	audio files are generally larger than their MP3 counterparts and are mostly
	used with MPEG-2 video streams.
	Note: MP2 is recommended for use with a high bandwidth video stream
	(ex: MPEG-4 or 6 Mbps - 3 Mbps).
	• MP3 (MPEG Audio Layer-3) is a popular digital audio encoding and loss
	compression format. It was designed to greatly reduce the amount of data
	required to represent the original audio data, yet still sound like a faithful
	reproduction of the original uncompressed audio to most listeners.
	Note: MP3 is recommended for use with a low bandwidth video stream
	(ex: MPEG-2 or < 3 Mbps).
Sampling Rate
	This is the sampling rate used by the incoming audio stream.
	• Sampling rate defines the number of samples per second taken from a
	continuous signal to make it a discrete signal.
	• Rate is measured in KHz (KiloHertz).
	• Available audio sampling rates: 32KHz, 44.1KHz, and 48KHz.
	• Some of the common uses for these rates include:
	- 32,000 KHz - miniDV digital video camcorder
	- 44,100 KHz - compact disc, also most commonly used
	with MPEG-1 audio (VCD, SVCD, MP3)
	- 48,000 KHz - digital sound used for digital TV, DVD, DAT,
	films and professional audio
	Note: Currently, 32KHz is not supported within the Modero firmware.
Audio Channels
	The number of audio channels encoded within the incoming audio stream.
	• Modero only supports 2CH (2 channel) audio.
Brightness:	Use the UP/DN buttons to alter the brightness level of the incoming signal.
	• Range = 0 - 255, default = 128.
Contrast:	Use the UP/DN buttons to alter the contrast level of the incoming signal.
	• Range = 0 - 255, default = 128.
Saturation:	Use the UP/DN buttons to alter the color saturation level of the incoming signal.
	• Range = 0 - 255, default = 128.
Hue:	Use the UP/DN buttons to alter the hue level of the incoming signal.
	• Range = 0 - 255, default = 128.

Refer to the Displaying Stream Content section on page 169 for the procedures used to configure the TPD4 touch panel pages and media stream source (using MAX-CSE for example purposes).

150 VG-Series Modero Touch Panels