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[Studies in Computational Intelligence 481] Artur Babiarz, Robert Bieda, Karol Jędrasiak, Aleksander Nawrat (auth.), Aleksander Nawrat, Zygmunt Kuś (eds.) - Vision Based Systemsfor UAV Applications (2013, Sprin

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14 A. <strong>Babiarz</strong> et al.<br />

• The camera IP address control (“remote ip address”) <strong>in</strong> optional <strong>in</strong>put no.1 is<br />

a required parameter for realization of the task connected with the camera<br />

speed movement parameters; this value is def<strong>in</strong>ed as a cha<strong>in</strong> of signs (text) of<br />

a structure commonly used <strong>in</strong> IP address def<strong>in</strong>ition : [A.B.C.D – where A, B,<br />

C parameters and D are the values of the 0 – 255 set, for e.g. 168.254.0.99]<br />

• The “video<strong>in</strong> set/get” of stream<strong>in</strong>g video transmission controls:<br />

o “codec” –a type of stream<strong>in</strong>g image transmission [mpeg4, mjpeg];<br />

o “resolution” – the resolution of the registered image [704x576,<br />

352x288, 176x144];<br />

o “maximum frame rate” – a number of video frames sent by<br />

second(fps) [1,…,25];<br />

o “<strong>in</strong>tra frame period” – def<strong>in</strong>es the time of “refresh<strong>in</strong>g” <strong>in</strong>dividual<br />

video frames <strong>in</strong> milliseconds (only <strong>in</strong> the MPEG4 transmission<br />

type);<br />

o “ratecontrolmode” – def<strong>in</strong>es the type of the video stream flow [fixed<br />

value “cbr” or variable value “vbr”] (only <strong>in</strong> the MPEG4<br />

transmission type);<br />

o “bitrate” – th value of the <strong>in</strong>tensity of the video stream <strong>in</strong> “cbr”<br />

module <strong>in</strong> kilobytes per second (only <strong>in</strong> the MPEG4 transmission<br />

type);<br />

o “quality” – def<strong>in</strong>es <strong>in</strong> “descriptive” way the average <strong>in</strong>tensity rate of<br />

the video stream (the quality of the image) MJPEG and MPEG4<br />

format of “vbr” type [Customize, Medium, Standard, Good,<br />

Detailed, Excellent];<br />

o “manual quality” – def<strong>in</strong>es the <strong>in</strong>tensity of the stream (the quality of<br />

the image) <strong>in</strong> “quality” = “customize” mode [1,…,31].<br />

2.7 The Audio-Stream Configuration Module<br />

The camera under tests offers a support for two-way audio-stream transmission <strong>in</strong><br />

two formats: AAC4 and GSM-AMR. There is also a possibility of configuration<br />

of the above stream<strong>in</strong>g formats. The functionality was realized <strong>in</strong> module<br />

VVT_AUDIOCONTROL_SET_GET.vi (Fig.8a). Due to the use of the URL<br />

commands <strong>in</strong> the module it is required to determ<strong>in</strong>e the IP address of the camera<br />

server and it is recommended to elicit a module <strong>in</strong> command of another ‘<strong>in</strong>ternal”<br />

event (for e.g. record/read<strong>in</strong>g parameter controls). This recommendation is related<br />

with the “long” time of the ULR command realization by the camera server.<br />

The description of the <strong>in</strong>put/output signals:<br />

The configuration of the audio transmission module parameters can work <strong>in</strong><br />

desired parameter sett<strong>in</strong>g mode (“set”) or <strong>in</strong> the acquisition of <strong>in</strong>formation about<br />

their actual condition (“get”). The change <strong>in</strong> functionality is realized by the

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