JP2007081577A - Video signal reproducing/displaying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video signal reproducing/displaying apparatus wherein a video reproducing apparatus can supply a reproduction signal with a most proper display format to a display apparatus by recognizing which kind of resolution in its display format the display apparatus connected to the video reproducing apparatus has. <P>SOLUTION: When a plurality of video data (e.g. SD video image and HD video image data) exist in a video recording and reproducing apparatus 10A, the display apparatus 30 transmits a signal denoting a displayable format to the video reproducing apparatus, the video recording and reproducing apparatus automatically selects optimum video data and can supply a video signal with the highest quality to the display apparatus. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a video signal reproduction / display device for reproducing and displaying a video signal recorded on a recording medium.

  In recent years, a DVD (Digital Versatile Disc) has been widely used as a medium for recording video information. However, a high-definition image broadcast signal such as a high-definition broadcast or a terrestrial digital broadcast, that is, a HD (High Definition) broadcast signal is recorded. For this reason, development of a medium and an apparatus capable of recording and reproducing with higher density is in progress.

In addition, as described in Patent Document 1 below, an optical disc that has a plurality of recording layers on one optical disc and can record and reproduce at different recording densities has been proposed. This optical disc is a DVD and a next-generation high-density medium that are currently in widespread use. SD (Standard Definition) video is used for the DVD layer, and HD (High Definition) is used for the next-generation high-density media. A video can be recorded. As a result, a single optical disk can be used for both conventional DVD equipment and next-generation high-density playback equipment.
JP 2004-95098 A

  However, when the same content is recorded on a single recording medium in different display formats such as SD and HD, which of them should be played depends on the performance of the display device that displays the video. . In order to maximize the performance of a display device, a high-resolution display device that supports HD video (generally 1080i or 720p) can play back HD video, and the conventional type that does not support HD video (that is, low video) In the case of a display device having a resolution, signals such as NTSC (National Television System Committee) are output using SD video.

  At this time, since the current video playback device does not know what resolution display device is connected, it is necessary for the user to make an appropriate selection, which is troublesome and the settings are not well understood. There is a problem that cannot be selected.

  The present invention has been made paying attention to the above points, by notifying the video playback device of a displayable format from the display device, automatically selecting the optimal video data without taking the user trouble, An object of the present invention is to provide a video signal reproducing / displaying device that enables the highest quality video output.

In order to achieve the above object, the present invention reads out a video signal from a recording medium on which video signals of a plurality of display formats including SD and HD are recorded, and outputs the video signal from the video playback device. In a video signal playback / display device comprising a display device that receives a video signal and displays the video,
The display device has display format signal output means for outputting a signal indicating a displayable format,
In response to the display format signal, the video playback device is configured to read out from the recording medium a video signal having an output video format optimum for the display format indicated by the display format signal and to output the video signal to the display device. .

  The video playback device is an optical disc device configured to be able to read a desired video signal from an optical disc in which video signals of different display formats are recorded on a plurality of recording layers. Is a preferred embodiment of the present invention.

  According to the present invention, when there are video data of a plurality of resolutions (for example, SD video and HD video) in the video playback device, the video display device notifies the video playback device of the displayable format, which takes time and effort to the user. It is possible to provide an optical disc video recording / reproducing apparatus that can automatically select the optimum video data and output the highest quality video.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a functional block diagram showing the configuration of the main part of an optical disk playback / display device as a first embodiment of a video signal playback / display device of the present invention. The optical disk playback / display device includes a video playback device 10 that can read and playback video signals from an optical disk, a display device 30 that displays video from the video playback device 10, and a cable 26 that connects the video playback device and the display device. , 28.

  The video reproduction apparatus 10 also includes a connector 24 for inputting / outputting video signals and control signals to the display apparatus 30, an input / output control unit 22 for controlling input / output and the entire apparatus, and encoding / decoding of signals to be recorded. A signal processing unit 18 that performs modulation / demodulation, an optical pickup unit 14 that reads / writes the optical disk 12 using laser light, an optical disk control unit 16 that moves and controls the laser light from the optical pickup unit 14 to a desired location, and a display device 30 The display capability determination unit 20 instructs the input / output control unit 22 on the optimum output format based on the displayable format information sent from.

  The display device 30 includes a display unit 40 that displays an image using a video signal transmitted from the video playback device 10, a connector 50 that inputs and outputs a video signal and a control signal from the video playback device 10, The input / output control unit 32 that controls the entire apparatus, the signal processing unit 36 that converts the received video signal into a signal for the display unit 40, and the display unit 40 is driven by the signal output from the signal processing unit 36. And a display capability output unit 34 for notifying the video reproduction device 10 of displayable format information of the display device 30.

  Further, the control signal communicated between the video reproduction device 10 and the display device 30 includes a connection detection signal that can recognize that the cable is connected, so that information is automatically obtained after the cables 26 and 28 are connected. Can be exchanged. Thereby, it is possible to set the video reproduction device 10 in a state in which an optimal video output can be performed without requiring the user to take time and effort.

<Second Embodiment>
FIG. 2 is a block diagram showing a part of the video reproduction apparatus used in the second embodiment of the video signal reproduction / display apparatus of the present invention. That is, the second embodiment is a video recording / reproducing apparatus capable of recording / reproducing on a two-layer optical disc in place of the video reproducing apparatus 10 in the first embodiment shown in FIG. In other respects, the configuration is the same as that of the first embodiment. A video recording / reproducing apparatus 10A used in the second embodiment includes a red laser circuit 11A for reading / writing a conventional DVD / CD and a blue laser circuit 11B for performing next-generation high-density recording / reproduction such as Blu-ray. Have two independent circuits. By having two circuit systems in this way, it is possible to support both a single medium and an optical disk having a plurality of recording layers (such as DVD and Blu-ray) on one optical disk 12A. .

  The signal processing unit 18A determines the type of the optical disk 12A inserted into the video recording / reproducing apparatus 10A, and reads / writes using an optimum circuit (red or blue laser system circuit) for each optical disk. The input / output control unit 22 performs input / output of control signals and video signals to / from the display device 30 and controls the entire device. The display capability determination unit 20 instructs the input / output control unit 22 on the optimum output format based on the displayable format information sent from the display device 30.

  The red laser system circuit 11A and the blue laser system circuit 11B share the same functional blocks, but the internal configurations of the laser light wavelength, objective lens, disk standard, signal format, etc. are completely different. The red laser system circuit 11A includes an optical pickup 48A having a laser beam wavelength of 650 nm and an objective lens NA of about 0.6, an encoder 42A for encoding a signal to be recorded, and a modulation for modulating the output signal of the encoder 42A. 44A, a strategy circuit 46A that converts the output signal of the modulator 44A into a multi-pulse recording signal suitable for the optical disc 12A, a servo 58A that moves the optical pickup 48A, and a detection signal from the optical pickup 48A An amplifier 50A, a demodulator 52A that demodulates the output signal from the amplifier 50A, a decoder 54A that decodes the output signal from the demodulator 52A and reproduces the signal, and an error signal from the amplifier 50A The servo signal generator 56A is configured to output a servo signal.

  The blue laser circuit 11B modulates the optical pickup section 48B having a laser light wavelength of 390 to 410 nm and an objective lens NA of about 0.85, an encoder 42B for encoding a signal to be recorded, and an output signal of the encoder 42B. Modulator 44B, a strategy circuit 46B that converts the output signal of the modulator 44B into a multi-pulse recording signal suitable for the optical disc 12A, a servo 58B that moves the optical pickup unit 48B, and a detection signal from the optical pickup unit 48B. An amplifier 50B for amplification, a demodulator 52B for demodulating the output signal from the amplifier 50B, a decoder 54B for decoding the output signal from the demodulator 52B and reproducing the signal, and an error signal from the amplifier 50B for focus and tracking The servo signal forming unit 56B outputs a servo signal such as.

  FIG. 3 is an enlarged cross-sectional view showing a cross section of a two-layer optical disc 12A as an example of the optical recording medium shown in FIG. This optical disk 12A has a plurality of (two layers in this example) recording layers, and a DVD layer is formed at a position 0.6 mm from the surface of the optical disk, and a BD layer is formed at a position 0.1 mm. Reading / writing of recording data to / from the DVD layer is performed using red laser light having a laser beam wavelength of 650 nm, and reading / writing of recording data to / from the BD layer is performed using blue laser light having a laser beam wavelength of 405 nm. Although both the DVD layer and the BD layer are single layers in FIG. 3, it is also possible to provide a plurality of recording layers and further increase the density.

  FIG. 4 is a diagram showing the shape and pin arrangement of a D terminal that is currently widely used in high-definition display devices. The D terminal has D1 to D5, and the video signal formats are SD (480i, 480p) video and HD (1080i, 720p, 1080p) video, and Y (luminance), Pb, Pr (color difference). The signal is transmitted. In addition, information about the number of scanning lines, the scanning line method, and the aspect ratio can be notified to the display device using the lines 1 to 3. In addition, a plug insertion detection pin is provided to detect whether or not the playback device and the display device are connected.

  However, although the display format transmission from the playback device to the display device is determined at the current D terminal, the display format transmission from the display device to the playback device is not clearly shown. Therefore, in the present invention, the displayable format of the display device is transmitted to the playback device using the spare line (pins 7, 10, 13) of the D terminal. As a method of using the spare line, for example, as shown in FIG. 5, the corresponding display format is notified from D1 to D5 using the spare line.

Further, the displayable format may be converted into serial data using a serial transmission of an asynchronous method such as RS-232C or a synchronous method such as I ² C. In this manner, display format transmission is possible without additional hardware by using the D terminal, which is now widely used.

  FIG. 6 is a flowchart for explaining the operation of the display device 30 in each embodiment of the video signal reproduction / display device of the present invention. In the display device 30, when it is confirmed that the power is turned on in step S <b> 1, after that, in step S <b> 2, the connection state of the cable is constantly monitored. A signal is transmitted to notify the video playback device 10 (or video recording / playback device 10A).

  FIG. 7 is a flowchart for explaining the operation of the video playback device 10 (or video recording / playback device 10A) in each embodiment of the video signal playback / display device of the present invention. In the video playback device 10 (or video recording / playback device 10A), when power-on is confirmed in step S11, the cable connection state is always monitored in step S12. When the cable connection is detected, a displayable format is displayed from the display device 30. Wait for the signal to be sent. At this time, if an existing display device is connected instead of the display device 30 shown in FIG. 1, a displayable format is not sent, so if information is not sent within a certain time, a time-out occurs ( Steps S13 and S14), the previous video output state (default state when there is no previous information) is held, and video output is performed (step S15).

  When a signal indicating a displayable format is transmitted from the display device 30, the transmitted signal is analyzed (step S16), and the display capability of the display device 30 is stored. When the optical disk 12 (or 12A) is inserted into the video playback apparatus 10 (or video recording / playback apparatus 10A), the optical disk analysis is performed to determine what type of optical disk (CD, DVD or BD, DVD + BD combo (composite disk). )), What kind of data (music data or video data), and what kind of video (SD video or HD video) if video data (step S17, step S18). Thereafter, a video format to be output to the display device 30 is selected and determined from the display capability sent from the display device 30, that is, a signal indicating a displayable format and video information read by optical disc analysis (step S19). Step S20).

  As an example, a case where an SD video and an HD video of the same content are recorded in advance on the two recording layers of the optical disc 12A shown in FIG. 2 will be described. The display device 30 has only the ability to display the SD video (that is, When the HD video is not displayed at a high resolution), the video recording / reproducing device 10A receives the signal indicating the displayable format from the display device 30 and reads the SD video from the layer in which the SD video signal is recorded. Then, the red laser system circuit 11A is driven. Specifically, only the red laser system circuit 11A is driven by the output signal of the display capability determination unit 20 in FIG. On the other hand, when the display device 30 has the ability to display HD video (that is, supports high resolution for displaying HD video), a signal indicating the displayable format is received from the display device 30 and video recording is performed. The playback device 10A drives the blue laser circuit 11B so as to read the HD video from the layer in which the HD video signal is recorded. Specifically, only the blue laser circuit 11B is driven by the output signal of the display capability determination unit 20 in FIG.

  When the video playback device 10 shown in FIG. 1 is used, if the display device 30 has only the ability to display SD video (that is, not compatible with high resolution for displaying HD video), a signal indicating the displayable format is displayed on the display device. 30, the video playback device 10 controls the optical disc controller 16 so as to read the SD video from the optical disc 10 on which the SD video signal is recorded. Specifically, the optical disk control unit 16 is driven by the output signal of the display capability determination unit 20 in FIG. On the other hand, when the display device 30 has the ability to display HD video (that is, supports high resolution for displaying HD video), a signal indicating the displayable format is received from the display device 30 and video playback is performed. The apparatus 10 controls the optical disc control unit 16 so as to read the SD video from the optical disc 10 on which the SD video signal is recorded. Specifically, the optical disk control unit 16 is driven by the output signal of the display capability determination unit 20 in FIG.

  The above description is for the case where the video playback device 10 is designed to play back SD video. When the video playback device 10 is designed to play back HD video, it operates as follows. That is, when the display device 30 has only the ability to display SD video (that is, not compatible with high resolution for displaying HD video), the video reproduction device 10 receives a signal indicating the displayable format from the display device 30. The optical disc control unit 16 is controlled so as not to read the HD video from the optical disc 10 on which the HD video signal is recorded. Specifically, the drive of the optical disc control unit 16 is stopped by the output signal of the display capability determination unit 20 in FIG. On the other hand, when the display device 30 has the ability to display HD video (that is, supports high resolution for displaying HD video), a signal indicating the displayable format is received from the display device 30 and video playback is performed. The apparatus 10 controls the optical disc control unit 16 so as to read the HD video from the optical disc 10 on which the HD video signal is recorded. Specifically, the optical disk control unit 16 is driven by the output signal of the display capability determination unit 20 in FIG.

  In each of the above embodiments, an example in which an optical disk device is used as a video playback device has been described. However, the present invention can be applied to a video playback device that can play back video data of multiple resolutions or multiple display formats. Therefore, the video reproduction apparatus is not limited to the optical disk apparatus, but can be applied to various video reproduction apparatuses using a VTR using a video tape, a hard disk, a semiconductor memory, and other storage media. Further, since the present invention has a feature when it is played back, the name of the present invention is the video signal playback / display device. However, as described in the second embodiment, the video recording / playback device also has a recording function. The same applies to the case of using.

  As is apparent from the above description, the video signal playback / display device of the present invention can supply a playback signal corresponding to the display capability of the display device from the video playback device to the display device. Can be automatically supplied from the video playback device to the display device, so that the video playback / display device can automatically supply the video signal with the most suitable resolution to the display device. It is useful in the technical field.

It is a functional block which shows the structure of the principal part of 1st Embodiment of the video signal reproduction | regeneration / display apparatus of this invention. It is a functional block which shows the structure of the principal part of the video reproduction apparatus used for 2nd Embodiment of the video signal reproduction | regeneration / display apparatus of this invention. It is sectional drawing of an example of the optical disk which has a some recording layer. It is a figure which shows the shape and pin arrangement of D terminal which can be used by each embodiment of this invention. In each embodiment of this invention, it is a figure which shows an example of the notification method of the corresponding display format using the spare line at the time of using D terminal. It is a flowchart explaining the operation | movement of the display apparatus in each embodiment of the video signal reproduction | regeneration / display apparatus of this invention. It is a flowchart explaining operation | movement of the video reproduction apparatus in each embodiment of the video signal reproduction | regeneration / display apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Video reproduction apparatus 10A Video recording / reproduction apparatus 11A Red laser system circuit 11B Blue laser system circuit 12, 12A Optical disk 14, 48A, 48B Optical pick-up part 16 Optical disk control part 18, 18A, 36 Signal processing part 20 Display capability judgment part 22, 32 Input / output control unit 24, 50 Connector 26, 28 Cable 30 Display device 34 Display capability output unit 38 Display drive circuit 40 Display unit 42A, 42B Encoder 44A, 44B Modulator 46A, 46B Strategy circuit 50A, 50B Amplifier 52A, 52B Demodulator 54A, 54B Decoder 56A, 56B Servo signal forming unit 58A, 58B Servo

Claims (2)

A video playback device that reads and plays back a video signal from a recording medium on which video signals of a plurality of display formats including SD and HD are recorded, and a display that displays the video by receiving the video signal output from the video playback device In the video signal playback / display device comprising the device,
The display device has display format signal output means for outputting a signal indicating a displayable format,
In response to the display format signal, the video playback device is configured to read out from the recording medium a video signal having an output video format optimum for the display format indicated by the display format signal and to output the video signal to the display device. A video signal reproduction / display device characterized by the above. The video reproduction device is an optical disc device, and is configured to be able to read a desired video signal from an optical disc in which video signals of different display formats are recorded on a plurality of recording layers. The video signal reproduction / display device according to claim 1.

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