KR100481524B1 - Apparatus for developing digital display/recorder device - Google Patents

Abstract

A development device for a digital playback device is disclosed. The development apparatus is a development apparatus of a digital reproduction apparatus for the development of a digital reproduction apparatus for processing a video signal applied through a lens and an audio signal applied through a microphone and recording them on a track formed on a magnetic tape. When the microcomputer and the optical information controlling the digital reproducing apparatus are recorded in the predetermined region, the optical information of the image incident on the image and the additional information measurable from the digital reproducing apparatus are recorded in the predetermined region. It has a data storage unit for outputting the data on the timing to the microcomputer. According to such a development apparatus, when developing / testing a prototype digital reproducing apparatus, the addition of simple hardware can reduce the time and manpower required for development / testing.

Description

Apparatus for developing digital display / recorder device

The present invention relates to a development apparatus of a digital reproduction apparatus, and more particularly, to a development apparatus of a digital reproduction apparatus for facilitating the development of a digital reproduction apparatus.

Typically, digital playback devices, such as digital camcorders, are used by engineers to test prototype products indoors and outdoors when hardware and software are fully developed, and modify the hardware and software according to the test results. Productization Since the digital reproducing device is a combination of optical and electronic devices, the optical device can be tested indoors and outdoors for AF (Auto Focus), AE (Auto Exposure), and AWB (Auto White Balance). Judgment should be given as to whether or not it is faithful to its function. The AF function adjusts the focal length between the lens and the subject of the digital reproducing apparatus, the AE function adjusts the amount of light incident on the lens, and the AWB function adjusts the blue and red colors of the image of the subject incident on the lens. Speak the ability to balance between. The AWB function has the highest energy of blue and the lowest red of the color of the subject incident through the lens, but corrects this as humans recognize the opposite.

When testing the prototype of a digital playback device, the prototype digital playback device is tested on an arbitrary subject in a suitable room (e.g., a laboratory, a laboratory). The test is performed by capturing an image of an arbitrary subject directly with a prototype digital player, playing the object, and analyzing the same.

On the other hand, when testing the AE function to control the amount of light incident to the lens provided in the digital playback device, conditions that cannot be tested in the test (in the laboratory, laboratory, etc.) indoors, for example, back light or excessive lens It is hard to test the AE function when forward light is applied. In addition, unlike the lamps provided in the room, it is difficult to reproduce all the changes due to natural light in the room. Accordingly, when developing a digital playback device, a prototype product should be tested outdoors according to the actual situation. In the related art, a test is performed by directly photographing a subject and playing it back with a digital playback device outdoors. It was. This requires a lot of time and effort when developing a digital playback device, but there is a problem that cannot be tested based on accurate data.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a development apparatus for a digital playback apparatus capable of calculating accurate data with little time and effort in developing a digital imaging apparatus. .

The above object is a development apparatus of a digital reproducing apparatus for the development of a digital reproducing apparatus for processing a video signal applied through a lens and an audio signal applied through a microphone and recording them on a track formed on a magnetic tape according to the present invention. The optical information of the image incident on the lens and the additional information measurable from the digital reproducing apparatus are recorded in the predetermined region when the microcomputer and the optical information controlling the digital reproducing apparatus are recorded in the predetermined region. This is achieved by a data storage unit which outputs positional information and data on timing to be recorded to the microcomputer.

Preferably, the optical information is at least one of AF (Auto Focus), AE (Auto Exposure), and AWB (Auto White Balance) for an image incident through the lens.

Preferably, the apparatus further includes a voltage sensing unit configured to detect a voltage of the power supply device for driving the digital reproducing apparatus and output the additional information to the microcomputer.

Preferably, the voltage sensing unit includes a voltage detector for detecting a voltage of the power supply device and an analog-digital converter for analog-to-digital converting the voltage detected by the voltage detector and outputting it to the microcomputer.

Preferably, the apparatus further includes a switching unit for selectively applying at least one or more of the voltage information detected by the AF, AE, AWB, and the voltage sensing unit to the microcomputer.

Preferably, the data storage unit outputs to the microcomputer the position information and the recording timing of the selected information by the selection means among the voltage information detected by the AF, AE, AWB, and voltage sensing unit.

Preferably, the data storage unit is any one of a MASK ROM, an EPROM, an EEPROM, a FLASH ROM, and a magnetic recording medium.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram for explaining the format of video data recorded on a magnetic tape in the digital camcorder of the present invention. After explaining the format of video data, the development apparatus for the digital playback apparatus will be described.

The illustrated data format includes an ITI (Insert and Track Information) sector, an audio sector, a video sector, and a sub code sector, and a gap is located between sectors to prevent inter-sector interference. This data format is a widely used format for recording / reproducing data in digital cameras, digital camcorders, and digital video. The illustrated sectors (audio sectors and video sectors) are ID, data (audio data, and video data), and AUX. (Auxilary) has data (AAUX, VAUX). The AUX data is included in the audio sector and the video sector, and is usually used to store additional functions and setting values in the included sector.

FIG. 2A illustrates a diagram for describing a structure of AUX data (hereinafter referred to as "AAUX") included in an audio sector. The AAUX included in the audio sector has a pack structure of 5 bytes in one pack. AAUX consists of a plurality of packs as shown. PC0 of the pack shown is a pack header, indicating the name and purpose of the pack. The remaining PC1 to PC4 become a space for storing data added to the packer PC0.

FIG. 2B is a diagram illustrating a structure of a source pack among packs configuring AAUX of an audio sector. The source pack is a pack for audio setup in AAUX. The AF size represents the setup value for the Audio Frame size, and the SM represents the stereo mode setup. As such, the AAUX included in the audio sector stores data necessary for audio setting. Similarly, AUX data (hereinafter referred to as "VAUX") included in the video sector also contain data necessary for video setting.

FIG. 2C illustrates a diagram for describing a source control pack included in VAUX.

As shown, the source control pack displays an aspect ratio of the "REC ST" indicating the start of recording of the video signal, the "recording mode" indicating the recording mode, and the display device (for example, CRT, LCD, etc.). Stores setting values such as "DISP". Here, you can see that the PC1 of the source control pack is reserved, which is used by engineers to add new features to digital playback devices (eg, digital cameras, digital camcorders, digital video, etc.). The space is empty.

The development device for a digital player of the present invention utilizes this reserved space to enable the prototype digital player to be tested outdoors.

3 is a block diagram of a prototype digital camcorder and a development apparatus for developing a digital camcorder in combination with a digital camcorder.

In FIG. 3, the digital camcorder includes a signal input unit 10, a signal processing unit 20, a controller 30, and a magnetic tape 40.

First, the process of recording the video and audio applied from the outside to the magnetic tape 40 will be described. Next, the process of reproducing the video and audio signals recorded on the magnetic tape will be described.

The signal input unit 10 receives an image and an audio signal and converts the same into a digital signal. Preferably, the signal input unit 10 includes a lens 11, a lens driver 12, a CCD signal input unit 13, a first analog-to-digital converter (first A / D) 14, a microphone 15, And a second analog-to-digital converter (second A / D) 16.

The lens 11 receives an image resulting from the subject. The lens driver 12 has a predetermined motor (not shown) for adjusting the focus of the lens 11. The lens 11 is driven by a built-in motor so that the lens and the subject have an optimal focal length. The CCD signal input unit 13 converts an image incident through the lens 11 into an electrical signal using a charge coupled device (CCD) device. The first analog-to-digital converter (first A / D) 14 converts an electrical signal output from the CCD signal input unit 13 into analog-to-digital conversion. On the other hand, the microphone 15 generates an electrical signal in response to the voice from the outside. The electrical signal generated at the microphone 15 is analog-to-digital converted at a second analog-to-digital converter (second A / D) 16. The optical detector 17 calculates AW, AE, and AWB values from the electrical signals analog-to-digital converted by the first analog-to-digital converter (first A / D) 14.

The signal processing unit 20 converts the video signal and the audio signal applied from the signal input unit 10 into data streams in a predetermined order (see FIG. 1). The signal processor 20 includes a memory controller 21, a memory 22, a modulator 23, a preamplifier 24, and a reproduction equalizer 25.

The memory controller 21 controls the memory 22 so that the digital video signal and the audio signal applied from the signal input unit 10 are recorded in the predetermined order in the memory 22. The order of recording in the memory 22 is recorded in the order of ITI sector, audio sector, video sector, and subcode sector, as mentioned in FIG.

The modulation / demodulation unit 23 modulates the video signal and the audio signal stored in the memory 22 and converts them into a form recordable on the magnetic tape 40. In general, the modulation / demodulation unit 23 digitally modulates a video signal and an audio signal applied from the memory controller 21 by a carrier frequency of 41.85 MHz. The preamplifier 24 receives a digitally modulated signal from the modulation / demodulation unit 23 and amplifies it. The current amplified signal drives head HEAD 27, and head 27 magnetizes magnetic tape 40. As shown in FIG. The microcomputer 28 controls the memory controller 21 so that the video signal and the audio signal are recorded in the memory 22 in a predetermined order (see FIG. 1).

Next, a process of reproducing the video signal and the audio signal recorded on the magnetic tape will be described. The head 27 obtains an electrical signal from the magnetic tape 40 according to the magnetic field change. The electric signal obtained from the head (HEAD) 27 is amplified by about 50db in the preamp section 24 and then applied to the reproduction equalizing section 25. The reproduction equalizer 25 corrects an error generated when the signal recorded on the magnetic tape 40 is converted into an electrical signal by the head HEAD 27. The electrical signal equalized by the reproduction equalizer 25 is demodulated by the modulation / demodulation unit 23, and the demodulated signal is applied to the signal reproduction unit 26 in a predetermined order by the memory controller 21, and the signal reproduction unit ( 26) restores it to video and audio and outputs it to the monitor and the speaker.

The development apparatus 50 for digital camcorder shown has the voltage detection part 51, the analog-to-digital converter 52, the microcomputer 53, the EEPROM 54, and the switching part 55. As shown in FIG.

The voltage detector 51 measures the output voltage of the power supply unit 30. The analog-digital converter 52 converts the voltage detected by the voltage detector 51 to analog-digital conversion. The microcomputer 53 receives the voltage value output from the analog-to-digital converter, and receives a predetermined position (for example, PC1 of the source control pack) for recording the voltage value from the EEPROM 54 to control the memory controller 21. do. As a result, the digital voltage value output from the microcomputer 53 is recorded on the magnetic tape 40 via the modulator / demodulator 23, the preamplifier 24, and the head HEAD 27. The area recorded on the magnetic tape uses a reserved area of the pack structure as mentioned in Fig. 2C.

The AF, AE, and AWB values detected by the optical detection unit 17 are applied to the microcomputer 53, and the applied AF, AE, and AWB values are recorded in the area set on the magnetic tape 40 by the EEPROM 54. do. The switching unit 55 selectively outputs at least one of digital voltage values, AF, AE, and AWB values output from the microcomputer 53 to the memory controller 21. For example, when the switch 55a and the switch 55b are short-circuited, the microcomputer 53 may switch only the digital voltage value indicating the voltage state of the power supply unit 30 and the AF value detected by the optical detector 17 to the memory controller 21. Output The EEPROM 54 has a setting value for the position where the digital voltage values, AF, AE, and AWB values output from the microcomputer 53 are recorded on the magnetic tape 40 and the intervals at which they are recorded. The position recorded on the magnetic tape 40 is recorded in the reserved area of the pack located in the AAUX or VAUX located in the audio sector or the video sector. In addition, the time interval recorded on the magnetic tape 40 arbitrarily sets the time interval as much as an engineer needs for development. For example, the time interval for detecting the voltage of the power supply unit 30 can be set in a few seconds to several minutes. In this case, when the engineer wants to test only the video region except the audio region, all the packs constituting the AAUX may store the AF, AE, and AWB values.

The digital voltage values, AF, AE, and AWB values applied by the microcomputer 53 to the memory controller 21 are rearranged according to the digital video format (see FIG. 1), and are modulated by the modulation / demodulation unit 23 and the preamplifier unit ( Current amplification at 24 drives the head HEAD 27. By developing the prototype digital camcorder, the engineer who developed the prototype digital camcorder by using this process can take images of the subject in the outdoor environment with various environments, the image according to the subject, the surrounding voice, and the optical data (AF, AE, AWB value) when the subject is captured. ) Can be recorded on the magnetic tape 40. Engineers can analyze the data recorded on magnetic tape 40 in the lab to reduce the time and manpower required to develop a prototype digital camcorder.

As described above, when developing / testing a prototype digital reproducing apparatus, the addition of simple hardware can reduce the time and manpower required for development / testing.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the present invention is not limited to the specific embodiments of the present invention without departing from the spirit of the present invention as claimed in the claims. Anyone of ordinary skill in the art can make various modifications, as well as such changes are within the scope of the claims.

1 is a view for explaining the format of video data recorded on a magnetic tape in the digital camcorder of the present invention;

2A is a view for explaining the structure of an AUX included in an audio sector;

2B is a view for explaining the structure of a source pack among packs constituting AAUX data of an audio sector;

2C is a diagram for explaining a source control pack included in VAUX data, and

3 is a block diagram of a prototype digital camcorder and a development apparatus for developing a digital camcorder in combination with a digital camcorder.

* Description of the symbols for the main parts of the drawings *

10: signal input unit 11: lens

12 lens driving unit 13 CCD signal input unit

14: first analog-to-digital converter 15: microphone

16: second analog-to-digital converter 17: optical detection unit

20: signal processor 21: memory controller

22: memory 23: change demodulation

24: preamplifier 25: reproduction equalizing unit

26: signal reproducing unit 27: head

28: microcomputer 30: power unit

51: voltage detector 52: analog-to-digital converter

53: micom 54: EEPROM

55: switching unit

Claims (7)

An apparatus for developing a digital playback apparatus for developing a digital playback apparatus for processing a video signal applied through a lens and an audio signal applied through a microphone, and recording the same on a track formed on a magnetic tape. A microcomputer that controls the digital player to record optical information of an image incident on the lens and additional information measurable from the digital player in a predetermined area of the track; And And a data storage unit for outputting position information on the predetermined area and data on the timing when the optical information is recorded in the predetermined area to the microcomputer. The method of claim 1, The optical information, And at least one of auto focus (AF), auto exposure (AE), and auto white balance (AWB) for the image incident through the lens. The method of claim 1, And a voltage sensing unit which detects a voltage of a power supply device for driving the digital reproduction device and outputs the additional information to the microcomputer as the additional information. The method of claim 3, The voltage sensing unit, A voltage detector detecting a voltage of the power supply device; and And an analog-to-digital converter configured to analog-to-digital convert the voltage detected by the voltage detector and output the micro-digital converter to the microcomputer. The method of claim 4, wherein And a switching unit for selectively applying at least one or more of the AF, AE, AWB, and voltage information detected by the voltage sensing unit to the microcomputer. The method of claim 5, The data storage unit, And the position information and the timing at which the information selected by the switching unit among the voltage information detected by the AF, AE, AWB, and the voltage sensing unit are output to the microcomputer. The method of claim 6, The data storage unit, An apparatus for developing a digital reproducing apparatus, characterized in that it is any one of a MASK ROM, an EPROM, an EEPROM, a FLASH ROM, and a magnetic recording medium.