Magnetic recording system and method for a digital still video recorder

• US 5,740,303 A
• Filed: 12/31/1990
• Issued: 04/14/1998
• Est. Priority Date: 12/29/1989
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Ban, Young-Kyun
• Primary Examiner(s): CHEVALIER, ROBERT
• Application Number:
  US07/636,128
• Time in Patent Office: 2,661 Days
• Field of Search: 358/310, 358/906, 358/909, 358/335, 358/342, 358/311, 358/539, 360/35.1, 369/19, 369/56, 369/58, 348/220, 348/222, 348/223, 386/117, 386/38
• US Class Current: 386/225
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 5/781 on disks or drums
• CPC Class Codes: H04N 5/907 using static stores, e.g. storage tubes or semiconductor memories H04N5/91 takes precedence
• CPC Class Codes: H04N 9/8047 using transform coding

Abstract

There is disclosed a magnetic recording system for a digital still video recorder. The system includes a sensing unit 10 for sensing release timing data and white balance correction data and exposure data, a CPU 20 for generating control signals, an image sensing unit 40 for receiving image of object through a lens and for converting optical signal into the image signal and for amplifying the image signal, and then for performing chrominance separation, gamma correction and the white balance correction, an external image signal input unit 50 for separating R, G, B chrominance signals from composite image signal to amplify the R, G, B chrominance signals, and for separating synchronizing signals from the composite image signal so as to apply to the CPU 20, an input selection switch 60 for generating an input selection control signal, an input selection circuit 70 for selecting one image signal of the image signals which are generated from the image sensing unit 40 and the external image signal input unit 50, a digital signal processing unit 80 for converting and processing the image signal into digital image signal, a magnetic data recording unit 90 for recording the digital image signal on a disc and a display unit 100 for displaying a status of the magnetic data recording unit 90.

Claims

1. A magnetic recording system for a digital still video recorder, said system comprising:

sensing means for generating release timing data, white balance correction data and exposure data in response to user control and detected image characteristics;

controlling means for receiving said release timing data, said white balance correction data, and said exposure data from the sensing means and for generating iris driving control signals, driving signal generation control signals, recording control signals, and display control signals;

driving signal generating means for receiving said driving signal generation control signals from said controlling means and for generating driving signals;

still image sensing means for receiving images of an object through a lens as optical signals, said still image sensing means comprising;

means for converting said optical signals into internally-generated still image signals;

means for amplifying the internally-generated still image signals; and

means for performing chrominance separation, gamma correction and white balance correction according to said iris driving control signals from said controlling means and the driving signals from the driving signal generating means to generate red, green and blue internal still chrominance signals;

external image signal input means for receiving externally-generated composite image signals, said external image signal input means comprising;

decoder means for separating red, green and blue external chrominance signals from the externally-generated composite image signals;

amplifier means for amplifying the red, green and blue external chrominance signals received from said decoder means; and

separator means for separating synchronizing signals from said externally-generated composite image signals, said synchronizing signals being input to said controlling means, said controlling means generating said driving signal in response to said synchronizing signals, and said externally-generated composite image signals being received from an external source at said external image signal input terminal;

input switching means for generating first input selection control signals, said controlling means receiving said first input selection control signals and for generating second input selection control signals in response to said first input selection control signals;

input selection means for selecting and providing one of the red, green and blue internal still chrominance signals generated from said still image sensing means and said red, green and blue external chrominance signals from said external image signal input means as selected still image signals, according to said second input selection control signals;

digital signal processing means for receiving the selected still image signals from said input selection means, for converting said selected still image signals into digital still image signals and for processing said digital still image signals in preparation for recording on a recording medium;

magnetic data recording means for recording the digital still image signals processed by said digital signal processing means on a disc according to the recording control signals; and

display means for receiving said display control signals and display a status of said magnetic data recording means.

2. A magnetic recording system for a digital still video recorder as claimed in claim 1, wherein said external image signal input means comprises:

decoder means for separating said red, green and blue external chrominance signals from the externally-generated composite image signals received at an external image signal input terminal;

amplifier means for amplifying the red, green and blue external chrominance signals from said decoder; and

separator means for separating the synchronizing signals from the externally-generated composite image signals received from said external image signal input terminal.

3. A magnetic recording system for a digital still video recorder, comprising:

sensing means for generating release timing data, white balance correction data and exposure data in response to detected image characteristics;

controlling means for generating iris driving control signals, driving signal generation control signals, recording control signals, and display control signals in dependence upon said release timing data, said white balance correction data and said exposure data;

driving signal generating means for generating driving signals in dependence upon said driving signal generation control signals;

image sensing means for receiving images of an object through a lens as optical signals, for converting said optical signals into internal still image signals, said image sensing means comprising;

means for amplifying the internal still image signals;

means for performing chrominance separation, gamma correction and the white balance correction according to said iris driving control signals and the driving signals to generate red, green and blue internal chrominance signals;

external image signal input means for receiving external image signals from an external source, said external image signal input means comprising;

decoder means for separating red, green and blue external chrominance signals from the external image signals;

amplifier means for amplifying the red, green and blue external chrominance signals; and

separator means for separating synchronizing signals from said the external image signals and providing said synchronizing signals to said controlling means, said controlling means generating said driving signal generation control signals in response to said synchronizing signals;

input selection switching means for generating input selection signals, said controlling means being responsive to said input selection signals for generating input selection control signals;

input selection circuit means for providing one of the red, green and blue internal chrominance signals from said image sensing means and red, green and blue external chrominance signals from said external image signal input means as red, green and blue selected chrominance signals in accordance with said input selection control signals;

digital signal processing means for receiving the red, green and blue selected chrominance signals from said input selection circuit means, for converting said red, green and blue selected chrominance signals into digital image signals, and for processing said digital image signals in preparation for recording on a recording medium; and

magnetic data recording means for recording the digital image signals;

said controlling means for determining when a disc is present in said magnetic data recording means, for determining whether the disc has available capacity for recording said digital image signals, for displaying a disc replacement message and checking for disc replacement if said disc has an inadequate capacity, and, if available capacity is adequate, for updating directory and file allocation information of said disc and controlling the recording of the digital image signals.

4. A recording method for a digital still video recorder, said method comprising the steps of:

receiving an externally applied video signal;

separating a synchronization signal from said externally applied video signal;

separating said externally applied video signal into red, green and blue external chrominance signals;

outputting said red, green and blue external chrominance signals in parallel;

receiving an image through lens and converting said image to an image signal;

separating said image signal into red, green and blue internal chrominance signals;

activating an input selection switch to generate a selection signal;

generating a switching control signal in response to said selection signal;

selecting for input, said red, green and blue external chrominance signals or said red, green and blue internal chrominance signals, to an analog-to-digital conversion circuit, said analog-to-digital conversion circuit being response to a driving signal generated by a driving signal generator, said driving signal generator being responsive to driving control signals generated by a central processing unit;

converting said red, green and blue internal chrominance signals to first digital red, green and blue chrominance signals, in response to said driving signal when said selecting step selects said red, green and blue internal chrominance signals for input;

controlling generation of said driving control signals in response to said synchronization signal for generating said driving signal for converting said red, green and blue external chrominance signals to second digital red, green and blue chrominance signals, when said selecting step selects said red, green and blue external chrominance signals for input;

convening said first or second digital red, green and blue chrominance signals into a luminance signal and a chrominance signal; and

recording said luminance and chrominance signals on a recording medium.