Telos ProSTREAM, Руководство пользователя

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ADTS-CRC:
ADTS-CRC includes CRC error correction and stream synchronization features to the ADTS transport and
can be used for maintaining transmission integrity when the signal is degraded.
ADIF:
Audio Data Interchange Format (ADIF) is a transport container more suited to files then streaming as the
data stream is preceded with a header packet and then raw AAC data follows. ADIF may be used in applica-
tions where the audio will be muxed with other audio channels for multi-channel transport, but is not likely
to be used in traditional streaming.
RAW:
Raw mode will release the AAC data stream without any transport container at all and consists of nothing
more than the encoded audio data.
Metadata
Metadata, or “ data about the data ,” can be combined with the audio stream for delivery to end clients. The
metadata includes textual information about the current content of the audio stream, such as track title and
artist, current program titles, or branding and can also include a URL to associate with the stream. Most end
clients which are used to play the streaming audio contain displays which can be used to present the text
information in real-time. In the event that no metadata is provided to ProSTREAM, the stream’s “Stream
Name” configuration will be included as the stream’s text content.
Most automation systems will provide an option for submitting metadata to a streaming server. Metadata
connections are made to ProSTREAM via TCP or UDP connections to port 9000. If no automated data
stream is available, a manual entry form is included in ProSTREAM to allow manual entry of playlist
information.
ProSTREAM includes default templates for several common automation data formats. Each of the tem-
plates can be modified to suit any changes needed, or new templates can be created. Metadata templates
can be selected via the front panel or via the web interface, however adding or changing templates can only
be done via the metadata manager portion of the web interface. The templates included with ProSTREAM
include the following:
♦
Character Parser Sample
♦
Line Parser Sample
♦
Nexgen Audio Sense
♦
Simian Template 1
♦
XML Parser Sample
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XML-Jazler
♦
XML-Jazler2
♦
XML-MediaTouch
♦
XML-MediaTouch2
♦
XML-Sample2
♦
XML-Zetta
The metadata selection page describes the format accepted by the templates in more detail. The ProS-
TREAM metadata parser utilizes the templates to determine the incoming data contents, and will wait for
a complete record before it will update the outgoing metadata. The template files used by ProSTREAM are