| 摘要 |
<p>In a mobile telephone, position data are obtained from an integral Global Positioning System (GPS) receiver (10) and edited in an editor (14) to provide a fixed number of bits of position and velocity data every second. The data are stored in a buffer (18) until voice samples become available and are then embedded in successive voice samples such that only a small percentage of bits in each voice sample are affected by the presence of the position data. The position and velocity data may be recovered at a receiver at a fixed location or at another mobile location. <IMAGE></p> |
