Real time speech compaction/relay with silence detection
AssigneeSperry Corporation
InventorsSteven H. Karban, James V. Drexler, Cleon L. Hennen
Life of this patent
Estimating the term…
Abstract
Speech compaction/replay apparatus for real time monitoring speech and filtering out periods of relative slence from a recording of the speech. The recording also containing synchronization and time code information for ensuring that on replay and in terms of real time the audio output will essentially replicates the analog speech input. The apparatus and technique minimizing the amount of storage media required to store the speech.
Claims15
A method for compacting and recording an analog signal in real time, comprising the steps of:
- distinguishing silent periods from audio periods in a received said analog signal;
- first recording a sync code indicative of the start of said audio periods, upon the detection of each said audio period;
- second recording a time code indicative of the total elapsed real time since the initialization of the steps of this method of a compacting system;
- upon detection of each said audio period;
- and
- third recording only the analog signal present during said audio periods;
- whereby the amount of storage media necessary to store said analog signal can be minimized;
- and
- whereby said analog signal can be recorded with reference to said total elapsed real time.
A method for replaying analog signals recorded with compaction in real time comprising the steps of:
- detecting successive ones of sync codes and real time clock codes accompanying an audio period of said analog signal recorded with compaction in real time, plus continuously recorded successive ones of real time clock sensor data;
- comparing successive ones of said real time clock codes to successive ones of said real time clock sensor data, upon detection of each said sync code;
- and
- first replaying said analog signal recorded with compaction in real time each time a match occurs between successive said real time clock codes and said real time clock sensor data;
- thereby synchronizing said audio periods of said analog signal recorded with compaction in real time with said real time clock sensor data.
Apparatus for compacting and recording an analog signal in real time comprising:
- silence detection means for monitoring and distinguishing audio and silent periods within said analog signal;
- means for producing a sync code signal when an audio period is detected;
- means for producing a time code signal reflecting the total elapsed real time since initiation of the apparatus when an audio period is detected;
- means for recording said sync and said time code signals and said analog signal;
- and
- control means for ensuring that only the analog signal occurring during each audio period plus the associated sync and time code signals to said each audio period are recorded;
- thereby deleting recording of said silent periods and minimizing the amount of recording media necessary to record said analog signal.
Apparatus for replaying a real time compacted analog signal, comprising:
- means for detecting a sync code, and a time code in a real time compacted analog signal;
- means for producing a real time clock signal;
- means for comparing said time code to said real time clock signal to determine when said audio periods should be replayed, thereby synchronizing said audio periods within the replayed analog signal;
- and
- means for replaying silence upon termination of each audio period.
Dependencies are inferred from the claim text.