Schedule Sound signal characteristics - Broadcasting Services (Technical Planning) Guidelines 2007 - Sound signal characteristics

Sound signal characteristics

Characteristics of the sound transmitter

The sound transmitter or transmitters shall be capable of operating with audio modulating frequencies between 40 Hz and 15 kHz. The audio modulating signal shall be pre‑emphasised, as shown in figure A3.6, in accordance with the impedance/frequency characteristic of a series resistance‑inductance network having a time constant of 50 microseconds.

First or single sound carrier modulation

For a single sound carrier system the carrier shall be modulated by the audio signal. The modulation of the first sound carrier of a dual sound system for the various transmission modes shall be in accordance with the following:

(a) monophonic transmission — the carrier shall be modulated by the audio signal;

(b) stereophonic transmission — the carrier shall be modulated by the compatible monophonic, or sum, component of the stereophonic audio signal, (L+R)/2;

(c) separate sound signal transmission — the carrier shall be modulated by the monophonic signal of the first sound channel.

Second sound carrier modulation

The modulation of the second sound carrier of a dual sound system for the various transmission modes shall be in accordance with the following:

(a) monophonic transmission — the carrier shall be modulated by the same audio signal as the first sound carrier;

(b) stereophonic transmission — the carrier shall be modulated by the audio signal arriving from the right hand signal source (R);

(c) separate sound signal transmission — the carrier shall be modulated by the monophonic signal of the second sound channel.

Identification of transmission mode

To identify the type of signal being transmitted, the second sound carrier shall be frequency modulated to a deviation of ±2.5 kHz ±500 Hz by a sub‑carrier of 3.5 times the line frequency (ie. 54.6875 kHz). This sub‑carrier shall be:

(a) unmodulated for monophonic transmission; and

(b) 50 per cent amplitude modulated with 117.5 Hz (line frequency divided by 133) for stereophonic transmission; and

Table A3.2: Timing intervals of the video signal

Duration(measured between half amplitude points)	MicrosecondsNominal Value	Tolerance
Field period (V)	20000
Line period (H)	64
Line blanking interval	12	+0.0, –0.3
Front porch interval	1.5	+0.3, –0.0
Line synchronising pulse interval	4.7	±0.2
Field blanking interval	25 H + 12	+0, –0.3
Duration of field synchronising pulse sequence	2.5 H
Duration of pre‑equalising pulse sequence	2.5 H
Duration of post‑equalising pulse sequence	2.5 H
Duration of equalising pulse	2.35	±0.1
Interval between field synchronising pulses	4.7	±0.2
Colour sub‑carrier burst
‑ start, from leading edge of line synchronising pulse	5.6	±0.1
‑ duration (nominally 10 cycles)	2.25	±0.25
‑ duration of burst blanking pulse (per field)	9 H
Build‑up time (10 to 90 per cent amplitude points)
Edges of
‑ blanking pulses	0.3	±0.1
‑ synchronising signals	0.3	±0.1

Table A3.3: Colour sub‑carrier amplitudes and phases for fully saturated primary and complementary colours

<table cellspacing="0" cellpadding="0" style="border-collapse:collapse"><tbody><tr><td style="width:74.55pt; border-top:1.5pt solid #000000; border-bottom:1.5pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableHeading" style="font-size:11pt"><span>Colour</span></p></td><td style="width:53.25pt; border-top:1.5pt solid #000000; border-bottom:1.5pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableHeading" style="font-size:11pt"><span>Luminance</span></p></td><td colspan="3" style="width:169.1pt; border-top:1.5pt solid #000000; border-bottom:1.5pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableHeading" style="font-size:11pt"><span>Peak to Peak Chrominance</span></p></td><td colspan="2" style="width:110.1pt; border-top:1.5pt solid #000000; border-bottom:1.5pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableHeading" style="font-size:11pt"><span>Chrominance Angle</span><span style="font-size:7.33pt; vertical-align:super">(2)</span></p></td></tr><tr><td style="width:74.55pt; border-top:1.5pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span></span></p></td><td style="width:53.25pt; border-top:1.5pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableHeading" style="font-size:11pt"><span>E’</span><span style="font-family:Times, serif; font-size:7.33pt; vertical-align:sub">Y</span></p></td><td style="width:49.35pt; border-top:1.5pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableHeading" style="font-size:11pt"><span>2E’</span><span style="font-family:Times, serif; font-size:7.33pt; vertical-align:sub">U</span></p></td><td style="width:49.35pt; border-top:1.5pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableHeading" style="font-size:11pt"><span>2E’</span><span style="font-family:Times, serif; font-size:7.33pt; vertical-align:sub">V</span></p></td><td style="width:48.8pt; border-top:1.5pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableHeading" style="font-size:11pt"><span>2S</span><span style="font-size:7.33pt; vertical-align:super">(1)</span></p></td><td style="width:49.65pt; border-top:1.5pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableHeading" style="font-size:11pt"><span>Line n</span><span style="font-size:7.33pt; vertical-align:super">(3)</span></p></td><td style="width:49.65pt; border-top:1.5pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableHeading" style="font-size:11pt"><span>Line n+1</span></p></td></tr><tr><td style="width:74.55pt; border-top:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>White/Reference</span></p></td><td style="width:53.25pt; border-top:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>100.0</span></p></td><td style="width:49.35pt; border-top:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span></span></p></td><td style="width:49.35pt; border-top:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span></span></p></td><td style="width:48.8pt; border-top:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span></span></p></td><td style="width:49.65pt; border-top:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span></span></p></td><td style="width:49.65pt; border-top:0.75pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span></span></p></td></tr><tr><td style="width:74.55pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>Yellow</span></p></td><td style="width:53.25pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>88.6</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>87.4</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>20.0</span></p></td><td style="width:48.8pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>89.6</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>167.1°</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>192.9°</span></p></td></tr><tr><td style="width:74.55pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>Cyan</span></p></td><td style="width:53.25pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>70.1</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>29.5</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>123.0</span></p></td><td style="width:48.8pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>126.4</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>283.5°</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>76.5°</span></p></td></tr><tr><td style="width:74.55pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>Green</span></p></td><td style="width:53.25pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>58.7</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>57.9</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>103.0</span></p></td><td style="width:48.8pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>118.1</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>240.7°</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>119.3°</span></p></td></tr><tr><td style="width:74.55pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>Magenta</span></p></td><td style="width:53.25pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>41.3</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>57.9</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>103.0</span></p></td><td style="width:48.8pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>118.1</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>60.7°</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>299.3°</span></p></td></tr><tr><td style="width:74.55pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>Red</span></p></td><td style="width:53.25pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>29.9</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>29.5</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>123.0</span></p></td><td style="width:48.8pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>126.4</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>103.5°</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>256.5°</span></p></td></tr><tr><td style="width:74.55pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>Blue</span></p></td><td style="width:53.25pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>11.4</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>87.4</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>20.0</span></p></td><td style="width:48.8pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>89.6</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>347.1°</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>12.9°</span></p></td></tr><tr><td style="width:74.55pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>Burst</span></p></td><td style="width:53.25pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>0</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>30.3</span></p></td><td style="width:49.35pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>30.3</span></p></td><td style="width:48.8pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>42.9</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>135.0°</span></p></td><td style="width:49.65pt; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>225.0°</span></p></td></tr><tr><td style="width:74.55pt; border-bottom:1.5pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>Reference black</span></p></td><td style="width:53.25pt; border-bottom:1.5pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span>0</span></p></td><td style="width:49.35pt; border-bottom:1.5pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span></span></p></td><td style="width:49.35pt; border-bottom:1.5pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span></span></p></td><td style="width:48.8pt; border-bottom:1.5pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span></span></p></td><td style="width:49.65pt; border-bottom:1.5pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span></span></p></td><td style="width:49.65pt; border-bottom:1.5pt solid #000000; padding-right:5.4pt; padding-left:5.4pt; vertical-align:top"><p class="TableText" style="page-break-after:avoid"><span></span></p></td></tr></tbody></table>

Note 1 G = (E’U2 + E’V2)½ E’U = 0.493(E’B – E’Y) E’V = 0.877(E’R – E’Y)

Note 2 The chrominance angles are measured anti‑clockwise from the E’U axis.

Note 3 Line n corresponds to the odd numbered lines of the first and second fields & the even numbered lines of the third and fourth fields.