Patent US4723162A successfully refreshed from Google Patents.
US4723162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television camera having an electronic viewfinder with a sound-level indicator
Assignee: US Philips Corp
•
Filing: 1986-08-25
•
Granted: 1988-02-02
•
Expires: 2006-08-25
Abstract
Abstract The display screen of an electronic viewfinder displays camera setting information components outside the screne image, so that a camera operator can check the camera settings and possibly modify them to desired values without having to look away from the scene image. In the camera according to the invention, the sound recording level is displayed in the viewfinder as a bar whose length varies logarithmically. A stable presentation of the sound recording level is the result.
Inventors
- 👤 Johannes G. Hamering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:20
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/60; H04N23/63; H04N23/633
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
113 words
A television camera comprising: an image sensor for generating an image signal corresponding to a view of a scene; an electronic viewfinder for receiving the image signal and for displaying an image corresponding to the view of the scene; means for receiving sound from the scene and for generating a sound signal corresponding to the sound received; means for generating a bar signal and for adding the bar signal to the image signal, the bar signal generating an image of a bar in the viewfinder outside the image corresponding to the view of the scene, said bar image having a length which is a linear function of the logarithm of the sound signal.
Claim 2
Dependent Claim
113 words
A television camera comprising: an image sensor for generating an image signal corresponding to a view of a scene; an electronic viewfinder for receiving the image signal and for displaying an image corresponding to the view of the scene; means for receiving sound from the scene and for generating a sound signal corresponding to the sound received; means for generating a bar signal and for adding the bar signal to the image signal, the bar signal generating an image of a bar in the viewfinder outside the image corresponding to the view of the scene, said bar image having a length which is a linear function of the logarithm of the sound signal.
Claim 3
Dependent Claim
49 words
A television camera as claimed in claim 1, characterized in that: the camera further includes means for receiving the sound signal and for producing an output signal proportional to the peak sound signal; and the bar signal is a linear function of the logarithm of the peak sound signal.
Claim 4
Dependent Claim
75 words
A television camera as claimed in claim 2, characterized in that the means for generating the bar signal comprises: means for generating a logarithmic voltage having a value V at any point in time T, where T is a linear function of the logarithm of V; and means for comparing the sound signal with the logarithmic voltage and for producing a comparison signal at least when the sound signal is equal to the logarithmic voltage.
Claim 5
Dependent Claim
64 words
A television camera as claimed in claim 3, characterized in that: the viewfinder display comprises a plurality of lines; and the means for generating the bar signal further comprises: means for producing a line-selection signal during at least one television line of the electronic viewfinder; and means for producing a sound level indicating signal in response to the line-selection signal and the comparison signal.
Claim 6
Dependent Claim
24 words
A television camera as claimed in claim 4, characterized in that the means for producing the sound level indicating signal comprises an AND gate.
Claim 7
Dependent Claim
75 words
A television camera as claimed in claim 1, characterized in that the means for generating the bar signal comprises: means for generating a logarithmic voltage having a value V at any point in time T, where T is a linear function of the logarithm of V; and means for comparing the sound signal with the logarithmic voltage and for producing a comparison signal at least when the sound signal is equal to the logarithmic voltage.
Claim 8
Dependent Claim
64 words
A television camera as claimed in claim 6, characterized in that: the viewfinder display comprises a plurality of lines; and the means for generating the bar signal further comprises: means for producing a line-selection signal during at least one television line of the electronic viewfinder; and means for producing a sound level indicating signal in response to the line-selection signal and the comparison signal.
Claim 9
Dependent Claim
24 words
A television camera as claimed in claim 7, characterized in that the means for producing the sound level indicating signal comprises an AND gate.
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) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |