US4056683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audio transmitting and receiving system
Assignee: Hitachi Ltd
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Filing: 1975-09-29
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Granted: 1977-11-01
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Expires: 1995-09-29
Abstract
Abstract A system for transmitting and receiving audio information includes an audio response unit for reading out pre-recorded digital audio information and editing the digital audio information in digital signal form. A transmitter is provided for transmitting the edited digital audio information, and a converter is provided at the receiving side for converting the transmitted digital audio information into an analog audio signal. One feature of the invention is that the announcer audio information in digital form may be mixed with the pre-recorded audio information in digital signal form.
Inventors
- 👤 Akio Suehiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:40
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/02; H04H60/07; H04B; H04B14/00; H04B14/02; H04B14/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
An audio transmitting and receiving system comprising an audio response unit for reading out prerecorded audio information and editing it to required information, transmission means for transmitting the edited information, and conversion means at a receiving side for converting the transmitted information into an analog audio signal, the improvement in that the audio response unit includes means for editing the audio information in digital signal form to produce a digital signal; further comprising conversion means for converting audio information for interruption into a digital signal, and digital mixer means for mixing the digital signal from the conversion means with the digital signal of the audio response unit.
Claim 2
Dependent Claim
107 words
An audio transmitting and receiving system comprising an audio response unit for reading out prerecorded audio information and editing it to required information, transmission means for transmitting the edited information, and conversion means at a receiving side for converting the transmitted information into an analog audio signal, the improvement in that the audio response unit includes means for editing the audio information in digital signal form to produce a digital signal; further comprising conversion means for converting audio information for interruption into a digital signal, and digital mixer means for mixing the digital signal from the conversion means with the digital signal of the audio response unit.
Claim 3
Dependent Claim
116 words
An audio transmitting and receiving system comprising an audio response unit including storage means for storing audio information in digital signal form and editing means for reading out selected audio information in digital signal form from said storage means to produce a digital output signal representing a desired message, transmission means for transmitting said digital output signal to at least one distant point, and conversion means at said distant point for converting said digital signal to an analog audio signal; further comprising conversion means for converting audio information for interruption into a digital signal, and digital mixer means for mixing the digital signal from the conversion means with the digital signal of the audio response unit.
Claim 4
Dependent Claim
116 words
An audio transmitting and receiving system comprising an audio response unit including storage means for storing audio information in digital signal form and editing means for reading out selected audio information in digital signal form from said storage means to produce a digital output signal representing a desired message, transmission means for transmitting said digital output signal to at least one distant point, and conversion means at said distant point for converting said digital signal to an analog audio signal; further comprising conversion means for converting audio information for interruption into a digital signal, and digital mixer means for mixing the digital signal from the conversion means with the digital signal of the audio response unit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |