Multiple variable rate audio message playback
AssigneeDiscovision Associates
InventorsWayne R. Dakin, Scott M. Golding
Life of this patent
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Abstract
Method and apparatus for recording and playing back a plurality of digitally encoded audio messages along with associated video data. The messages are combined along with a plurality of corresponding audio message initial data address signals and recorded on a recording medium with the video data. In playback, the address and audio data signals are retrieved from the recording medium and stored. The address signals are utilized to access selectable messages for decoding and playback with selected video data. Codes can be included to control the decoding rate in accordance with the sample rate of the audio message data.
Claims8
A method for playing back a selected one of a plurality of discrete audio mesage units included in a block of composite digital audio data recorded on a record medium as a first sequential series of said plurality of discrete audio message units, and a second sequential series of a corresponding plurality of message pointer units, the entirety of said second sequential series occurring on the record medium upstream of the entirety of said first sequential series, said method comprising the steps of:
- employing a player means for recovering said block of composites digital audio data from the record medium;
- storing said recovered block of composite digital audio data within an addressable digital data storage means operatively associated with said player means, with each of said message pointer units being stored at respective, fixed storage locations within said storage means, and each of said audio message units being stored at respective, predetermined storage locations within said storage means;
- generating a coded message select command signal indentifying the selected one of said plurality of audio message units;
- employing means operatively associated with said storage means and responsive to said coded message select command signal for retrieving said message pointer unit corresponding to said selected audio message unit from its said fixed storage location within said storage means, wherein each of said message pointer units includes sampling rate code information indicative of a predetermined digital sampling rate at which its corresponding said audio message unit is to be decoded, said operatively associated means being further responsive to said coded message select command signal for retrieving said selected audio message unit from its said predetermined storage location within said storage means;
- deriving said sampling rate code information from said retrrieved message pointer unit corresponding to said selected audio message unit;
- employing means responsive to said derived sampling rate code information for decoding the retrieved said selected audio message unit at said predetermined digital sampling rate indicated by said derived sampling rate code information;
- and,
- employing said player means to play back the decoded said selected audio mesage unit.
Dependencies are inferred from the claim text.