Section 5.7.1.5.1

Author: ocampana-videotec

doc/PTZ.xml

@@ -1531,8 +1531,20 @@ Add GeoMove</revremark>
         </section>
         <section xml:id="_Ref469302658">
           <title>Normalized digital zoom position space</title>
-          <para>The normalized digital zoom position space represents the mapping between the width of the window (Ww) used for a video stream and the width of the Bounds element of the video source configuration (Sw). This space requires a Media Profile that includes a VideoEncoderConfiguration and a VideoSourceConfiguration.</para>
-          <para>The normalized digital zoom factor is calculated as 	<inlineequation><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>Z</mml:mi><mml:mi></mml:mi><mml:mo>=</mml:mo><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mi></mml:mi><mml:mo>(</mml:mo><mml:mfrac><mml:mrow><mml:mi>W</mml:mi><mml:mi>w</mml:mi></mml:mrow><mml:mrow><mml:mi>S</mml:mi><mml:mi>w</mml:mi></mml:mrow></mml:mfrac><mml:mo>)</mml:mo><mml:mi></mml:mi></mml:math></inlineequation> .</para>
+          <para>The normalized digital zoom position space represents the mapping between the width of the window <inlinemediaobject>
+              <imageobject>
+                <imagedata fileref="equations/PTZ/W_w.svg" contentdepth="5mm"/>
+              </imageobject>
+          </inlinemediaobject> used for a video stream and the width of the Bounds element of the video source configuration <inlinemediaobject>
+            <imageobject>
+              <imagedata fileref="equations/PTZ/S_w.svg" contentdepth="5mm"/>
+            </imageobject>
+          </inlinemediaobject>. This space requires a Media Profile that includes a VideoEncoderConfiguration and a VideoSourceConfiguration.</para>
+          <para>The normalized digital zoom factor is calculated as <inlinemediaobject>
+              <imageobject>
+                <imagedata fileref="equations/PTZ/normalized_digital_zoom_factor.svg" contentdepth="12mm"/>
+              </imageobject>
+          </inlinemediaobject> .</para>
           <para>The maximum zoom level that can be represented by this space is limited by the smallest size of the window allowed by the camera.</para>
           <para>The normalized digital position zoom space is defined as follows: <footnote xml:id="__FN4__"><para>The particular device should reference the proposed name space but the actual range is device specific. The range indicated in the definition shall be interpreted as the maximum range limit for the space.</para></footnote></para>
           <programlisting><![CDATA[<tt:AbsoluteZoomPositionSpace>
@@ -1549,7 +1561,11 @@ Add GeoMove</revremark>
           <para>It’s  important  to  notice  that  a  zoom  operation  using  this  space  doesn’t  affect  the  current resolution of the video stream being configured in the VideoEncoderConfiguration of the Media Profile. Instead it changes the width and height of the window configured in the VideoSourceConfiguration.</para>
           <section>
             <title>Example: Zoom level for cropped area</title>
-            <para>For example, a digital PTZ unit with a natively cropped VGA (640x 480) window on a 3MP sensor (2048x1536) would have the zoom level  <inlineequation><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>Z</mml:mi><mml:mi></mml:mi><mml:mo>=</mml:mo><mml:mn>1</mml:mn><mml:mi></mml:mi><mml:mo>/</mml:mo><mml:mo>(</mml:mo><mml:mfrac><mml:mrow><mml:mn>640</mml:mn></mml:mrow><mml:mrow><mml:mn>2048</mml:mn></mml:mrow></mml:mfrac><mml:mo>)</mml:mo><mml:mo>=</mml:mo><mml:mn>3.2</mml:mn><mml:mo>.</mml:mo></mml:math></inlineequation></para>
+            <para>For example, a digital PTZ unit with a natively cropped VGA (640x 480) window on a 3MP sensor (2048x1536) would have the zoom level <inlinemediaobject>
+                <imageobject>
+                  <imagedata fileref="equations/PTZ/normalized_digital_zoom_factor_example.svg" contentdepth="12mm"/>
+                </imageobject>
+            </inlinemediaobject></para>
           </section>
         </section>
       </section>

doc/equations/PTZ/normalized_digital_zoom_factor_example.xml

@@ -0,0 +1,14 @@
+<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
+  <mml:mi>Z</mml:mi>
+  <mml:mo>=</mml:mo>
+  <mml:mfrac>
+    <mml:mrow>
+      <mml:mn>2048</mml:mn>
+    </mml:mrow>
+    <mml:mrow>
+        <mml:mn>640</mml:mn>
+    </mml:mrow>
+  </mml:mfrac>
+  <mml:mo>=</mml:mo>
+  <mml:mn>3.2</mml:mn>
+</mml:math>