Method and apparatus of controlling a camcorder by providing an alarm and rewinding a tape to prevent undesired recording
AssigneeSamsung Electronics Co., Ltd.
InventorKnow-Jin Kim
Life of this patent
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Abstract
A method and apparatus of controlling a camcorder, is disclosed which removes an undesired recorded portion of a video tape where the undesired recorded portion occurred with the focus being incorrectly aligned. When an operator diverts his attention from taking pictures, an alarm is provided to the operator when mis-alignment of focusing due to movement of the camcorder continues for a specified time duration, and thereafter a rewinding operation of the tape occurs to the beginning of the undesired recorded portion.
Claims9
A recording control apparatus for use in a camcorder, comprising:
- a camera device converting incident light into an electric color signal;
- a matrix circuit receiving the electric color signal from the camera device, for producing therefrom a luminance signal and chroma difference signal;
- an encoder generating a video signal by modulating the chroma difference signal in quadrature two-phase;
- a video signal processor processing the video signal to thereby provide the processed signal to a recording head;
- a bias circuit driving the recording head during recording of the video signal;
- an automatic focusing device adjusting a focus by controlling intensity of the incident light passing through a set of lens;
- a lens driver operated by the automatic focusing device, for adjusting the lens;
- a temperature sensor arranged in the camcorder, for sensing temperature change, after the camcorder enters a recording mode, due to contact of a hand of an operator and for providing a temperature sensed signal corresponding to a temperature of the hand indicating that the camcorder is recording a desired recorded portion of a video tape;
- control means for sensing the temperature sensed signal, for producing a first signal in dependence upon occurrence of one of reception a signal indicating mis-alignment of focusing from the automatic focusing device, and said temperature sensed signal indicating an absence of the hand after the camcorder has entered into the recording mode, for producing a second signal controlling the bias circuit to turn off the recording mode when the first signal continues to be generated for a predetermined time, and for producing a third signal to rewind videotape within the camcorder to a beginning of a selected recorded portion of the video tape, said selected recorded portion corresponding to a section of the video tape recorded during a period defined by one of the predetermined time and after the camcorder enters a recording mode, when no temperature sensed signal is provided by the temperature sensor;
- and
- alarm generating means receiving the second signal from the control means, for generating an alarm for a specified time.
A control method for a camcorder, wherein an electric color signal is generated from an incident light through a lens, a chroma difference signal is generated on a basis of the electric color signal, the chroma difference signal is converted into a video signal to thereby be recorded onto a video tape by a recording head, and a device automatically adjusts a focus by controlling the lens, said method comprising the steps of:
- recognizing, after the camcorder enters a recording mode, recording upon a medium within the camcorder of a selected recorded portion by the camcorder by sensing a temperature of a hand of an operator on the camcorder;
- sensing focusing of the camcorder and determining mis-alignment of said focusing;
- providing an alarm when a time duration of the misalignment of the focusing exceeds a given time value, and
- if the alarm continues beyond a specified time, returning the medium within the camcorder to a frame corresponding to a period defined by one of a beginning of the mis-alignment of focusing, and occurrence of the camcorder entering into the recording mode while no hand temperature is sensed.
A recording control device for a video recorder, said recording control device comprising:
- temperature sensing means for, during recording of video signals by the video recorder, providing a temperature sensed signal corresponding to a temperature at a part of the video recorder, by providing a first logic state for the temperature sensed signal in response to a range of temperatures including a bodily temperature of a user and a second logic state for the temperature sensed signal corresponding to said temperature not being within said range;
- control mean for providing when a mis-alignment signal from a focussing device of the video recorder for a predetermined period of time during occurrence of the second logic state of the temperature sensed signal:
- a stop-recording signal to stop said recording by the video recorder upon a recording medium within the video recorder, and
- a rewind signal to return the recording medium to a frame of the video signal corresponding in time to one of a time when the second logic state of the temperature sensed signal first occurred and a time when the mis-alignment signal was first provided.
A method for controlling a video recorder, said control method comprising the steps of:
- sensing a temperature at a part of the video recorder and providing a temperature sensed signal during recording of the video recorder, said temperature sensed signal having a first logic state corresponding to temperatures within a range of temperatures activated by body temperatures of a human user and a second logic state corresponding to temperatures not within said range;
- generating a mis-alignment signal when the video recorder is not optically focussed;
- generating, when the mis-alignment signal occurs for a predetermined period of time during occurrence of the second logic state of the temperature sensed signal:
- a stop-recording signal to stop the recording of a video signal upon a recordable medium within the video recorder, and
- a rewind signal to return the recordable medium to a frame corresponding in time to one of a first time when the second logic state of the temperature sensed signal was first received and a second time when the mis-alignment signal was first received.
Dependencies are inferred from the claim text.