Odetics, Inc.

Victor Blum

A plurality of audio messages are recorded on a multitrack tape. A digital location code is recorded on the first track followed by recording of a first audio message. The remaining tracks are recorded with digital location codes simultaneously with the recording of the first message. When a second message is to be recorded while the first message is still being recorded on the first track. Recording of the digital codes on the second track is stopped and the second audio message is recorded on the second track. When all the audio messages are recorded the tape motion is stopped.

Method of writing and reading digital data interspersed with analog

A recording system is provided in which digital time code information is recorded interspersed on the same data track as analog audio message signals. The time codes have a unique format which enables their bit rate to be extracted while reading the code, thus enabling use of the system with tape transports having unregulated fast wind speeds. The system is placed in a fast wind mode of operation and time codes are read and compared to a preselected time code in order to locate a desired audio message for playback. The configuration of the system ensures that the playback of each message will commence only at the beginning of a message. In addition, the invention eliminates the need for a separate data track for time codes, thus increasing the signal to noise ratio of the system.

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Tel Aviv, Israel

Victor Blum