| 摘要 |
A voice message from a user telephone (11) is recorded (FIG. 3) by being converted to digitally coded form and processed through a computer memory (32) prior to placement in bulk storage (31) memory sectors of uniform size. The message is retrieved in a playback operation (FIG. 4). Signal energy estimates for respective memory-sector-sized parts of the message are computed, stored, and used for various purposes including message playback speed control. User-originated command data messages to the computer cause editing of the message in accordance with the commands. To effect editing, the user directs the establishment of one or more pointers at selectable silent-sector points in the message, orders the computer to display the pointer relative positions, and orders a selectable editing operation with reference to at least one of the displayed pointers.
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