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1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" 2 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml" 4lang="en" xml:lang="en"> 5<head> 6<title>Video: Talking Phonebook: Eyes-Free Communication Device</title> 7<meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"/> 8<meta name="generator" content="Org-mode"/> 9<meta name="generated" content="2009-03-30 Mon"/> 10<meta name="author" content="T.V Raman"/> 11<style type="text/css"> 12 html { font-family: Times, serif; font-size: 12pt; } 13 .title { text-align: center; } 14 .todo { color: red; } 15 .done { color: green; } 16 .tag { background-color:lightblue; font-weight:normal } 17 .target { } 18 .timestamp { color: grey } 19 .timestamp-kwd { color: CadetBlue } 20 p.verse { margin-left: 3% } 21 pre { 22 border: 1pt solid #AEBDCC; 23 background-color: #F3F5F7; 24 padding: 5pt; 25 font-family: courier, monospace; 26 font-size: 90%; 27 overflow:auto; 28 } 29 table { border-collapse: collapse; } 30 td, th { vertical-align: top; } 31 dt { font-weight: bold; } 32 33 .org-info-js_info-navigation { border-style:none; } 34 #org-info-js_console-label { font-size:10px; font-weight:bold; 35 white-space:nowrap; } 36 .org-info-js_search-highlight {background-color:#ffff00; color:#000000; 37 font-weight:bold; } 38 39</style> 40</head><body> 41<h1 class="title">Video: Talking Phonebook: Eyes-Free Communication Device</h1> 42 43 44 45<div id="outline-container-1" class="outline-2"> 46<h2 id="sec-1">1 <a href="http://www.youtube.com/watch?v=UPIU2tj7dBI">Video: Talking Phonebook: Eyes-Free Communication Device</a></h2> 47<div id="text-1"> 48 49 50<p> 51Pressing the <u>menu</u> button while in the <i>Talking Dialer</i> toggles 52between <u>dialing mode</u> and <u>phonebook</u>. 53When in <u>phonebook</u>, you get eyes-free access to your contacts 54with the ability to quickly move to the contact that you wish 55to call. 56</p> 57<p> 58When in the <u>phonebook</u>, you can 59scroll through your contacts and press the <u>call</u> button to call 60the <i>current</i> contact. In addition, you can use <i>stroke dialing</i> 61as explained below to quickly move to a specific contact. 62</p> 63 64</div> 65 66<div id="outline-container-1.1" class="outline-3"> 67<h3 id="sec-1.1">1.1 Entering Letters Using Stroke dialing </h3> 68<div id="text-1.1"> 69 70 71<p> 72We covered eyes-free input with the touch screen in the <a href="./02-strokes.html">earlier video on stroke dialing</a> 73— in that video, we illustrated the concept via a traditional 74phone keypad. Here, we extend that technique 75to enable textual input. 76In the explanation below, we will use compass directions to help 77with orientation. 78As before, we will use relative positioning i.e., for the rest of 79this explanation, you can start <i>anywhere</i> on the touch-screen 80— though we recommend (for reasons that will become evident) 81that you start somewhere close to the middle of the screen. 82</p> 83</div> 84 85</div> 86 87<div id="outline-container-1.2" class="outline-3"> 88<h3 id="sec-1.2">1.2 The Eight Compass Directions</h3> 89<div id="text-1.2"> 90 91 92<p> 93Defining the <i>center</i> as where you first touch down on the 94screen, notice that you can stroke in any one of the <u>8</u> compass 95directions, and that opposite pairs of compass directions e.g., 96North and South, can be thought of as <i>opposites</i>. 97So we get <u>4</u> pairs. We enumerate these below, 98associate them with the <u>4</u> Google colors, and equate them 99to their equivalent strokes from the <i>stroke dialer</i>: 100</p> 101 102<ul> 103<li> 104Red: North-West and South-east <u>1</u> and <u>9</u>. 105</li> 106<li> 107Blue: North and South — <u>2</u> and <u>8</u>. 108</li> 109<li> 110Green: North-East and South-West — <u>3</u> and <u>7</u>. 111</li> 112<li> 113Yellow: East and West — <u>4</u> and <u>6</u>. 114 115</li> 116</ul> 117 118<p>Now, let's place the letters of the alphabet on these <u>4</u> circles 119as follows: 120</p> 121<ul> 122<li> 123Red: <u>A</u> … <u>H</u> 124</li> 125<li> 126Blue: <u>I</u> … <u>P</u> 127</li> 128<li> 129Green: <u>Q</u> … <u>X</u> 130</li> 131<li> 132Yellow: <u>Y</u> … <u>Z</u>. 133 134</li> 135</ul> 136 137<p>To input a given letter, we <i>stroke</i> to the circle containing the 138desired letter, trace along the circle till we hear the letter we 139want, and lift up the finger to make the selection. Letters are 140spoken in a female voice while moving along the selected circle; 141lifting up the finger speaks the selected letter in a male voice. 142</p> 143<p> 144Notice that conceptually, we have defined a fairly simple mapping 145from strokes to letters of the alphabet! 146</p></div> 147 148</div> 149 150<div id="outline-container-1.3" class="outline-3"> 151<h3 id="sec-1.3">1.3 Skimming The Contact List</h3> 152<div id="text-1.3"> 153 154 155<p> 156So to cut a long story short, you <i>dont need to</i> scroll through 157the contact list. To quickly jump to a contact, use the technique 158described above to input the first letter from the contact's name 159— the aplication jumps to contacts starting with that 160letter. At that point, you can either scroll, or enter additional 161letters to further filter the contact list. 162</p> 163 164</div> 165 166</div> 167 168<div id="outline-container-1.4" class="outline-3"> 169<h3 id="sec-1.4">1.4 Examples Of Using Strokes For Letters</h3> 170<div id="text-1.4"> 171 172 173 174<p> 175Notice from the mapping shown earlier that we can <i>enter</i> each 176circle either at the <u>top</u> or <u>bottom</u>. Thus, entering the red 177circle at the <u>top</u> gets to <u>A</u>, while entering it at the 178<u>bottom</u> gets us to <u>E</u>. This means that the <u>8</u> letters on any 179given circle are no more than <u>3</u> steps away — for example, to 180enter <u>C</u>, one needs to trace clockwise from <u>A</u>, or 181counter-clockwise from <u>E</u>. As an example, <u>H</u> is only <u>1</u> step 182from <u>A</u> on the red circle. similarly, <u>P</u> is only <u>1</u> step from 183<u>I</u> on the blue circle. 184</p> 185</div> 186</div> 187</div> 188<div id="postamble"><p class="author"> Author: T.V Raman 189<a href="mailto:raman@google.com"><raman@google.com></a> 190</p> 191<p class="date"> Date: 2009-03-30 Mon</p> 192<p>HTML generated by org-mode 6.08c in emacs 23</p> 193</div></body> 194</html>