JP2006121299A - Recording reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that, when picture-in-picture (PinP) display is executed with two video images having different frame rates and if a frame rate of a main image is slow, it causes a moving image to be very difficult to view. <P>SOLUTION: An image comparison means is provided. The frame rates of two video image signals are compared with each other. A PinP image is synthesized by making a faster frame rate as the frame rate of a main screen. Consequently, a comfortable moving image can be always realized. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a recording / reproducing apparatus such as a digital camera capable of recording / reproducing moving images and still images, a camera-integrated VTR (video camera), or a disk recording / reproducing apparatus (DVD recorder / hard disk recorder, etc.).

  2. Description of the Related Art Conventionally, a video camera captures an image of a subject (imaging from a lens system onto a CCD as an imaging device and is converted into an electrical image signal, and a predetermined imaging process is performed in an imaging process unit). Monitor means for confirming an image (the image pickup signal converted into an electric image signal is digitized and converted into a DV format and then monitored as a video signal such as NTSC / PAL), and a recording / reproduction means for recording the image pickup image (Recording / reproducing an image signal converted into a DV format on a tape).

  In recent years, a number of recording / reproducing apparatuses having a plurality of recording / reproducing means have been increasing. For example, taking a video camera as an example, the first recording / reproducing system is compatible with a mini DV tape, and the second recording / reproducing system is used. Video cameras that support memory cards are the mainstream. Also, as a deck type recorder that replaces a VTR, a hybrid type device such as a recorder equipped with a DVD drive and a hard disk (HD) and a recorder equipped with a VHS and HD has become popular.

  On the other hand, even if there are a plurality of playback means, the user usually connects only one TV monitor that displays the display image. When trying to play back multiple images at the same time, the user can divide the screen into multiple parts. In other words, two screens are displayed simultaneously by combining pictures in picture (PinP).

Further, in recent years, a disk reading technique has been developed, and a configuration for reading a plurality of recorded information at a high speed has been realized, so that even a single reproducing means can simultaneously reproduce a plurality of images and display the above-mentioned PinP. It has become. Such prior art is disclosed in, for example, Patent Document 1.
JP 2001-8168 A

  However, the recording / reproduction to the second recording / reproducing system, for example, a memory card, is generally made mainly for still image shooting. If it is a moving image, the frame rate is low, and a frame that can be reproduced normally on a TV or the like. The fact is that there is almost no rate output.

  Accordingly, when PinP display is performed with the second recording / playback system as the main screen and the first recording / playback system as the child screen, the video of the first recording / playback system, which originally has a high dynamic resolution, has a dynamic resolution. Depending on the low frame rate of the second recording / playback video, the video becomes unsightly.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a recording / reproducing apparatus that solves the above-described problems and enables high-resolution reproduction regardless of the frame rate of the imaging system.

  In order to solve the above-described problem, the recording / reproducing apparatus of the present invention includes a first reproducing unit capable of reproducing a video signal, a second reproducing unit capable of reproducing a video signal, and the first reproducing unit. Comparing means for comparing the frame rate of the first reproduction signal reproduced by the second reproduction signal reproduced by the second reproduction means, image synthesis means for performing image synthesis of each reproduction signal, And a control means for controlling image composition processing in the image composition means, wherein the control means is based on a frame rate determined from a comparison result in the comparison means. And controlling to generate a composite image of the first reproduction signal and the second reproduction signal.

  Another recording / reproducing apparatus according to the present invention includes a reproducing unit capable of reproducing a plurality of video signals and a comparison for comparing the frame rates of the first reproduced signal and the second reproduced signal reproduced by the reproducing unit. And a control unit for controlling an image synthesis process in the image synthesizing unit. The control unit is connected to the comparing unit. And controlling to generate a composite image of the first reproduction signal and the second reproduction signal in the image composition means based on the frame rate determined from the comparison result.

  According to the present invention, a plurality of video signals reproduced by a plurality of reproduction systems or a plurality of video signals read out at high speed are reproduced when, for example, picture-in-picture (PinP) composition is performed for display. It is possible to display an easy-to-view video that is not affected by the frame rate of each video signal.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a drawing of a recording / reproducing apparatus that best represents the features of the present invention. In FIG. 1, M1 is a magnetic tape (cassette tape) for digital video recording, M2 is an SD card or MMC card, and B1 is control of each part. System controller B2, playback video signal processing circuit for converting video signal from cassette tape M1 to video signal, B3 JPEG / MPEG processing SD / MMC memory for playback of SD card and MMC card M2 video signal A card controller B4 is a character signal generation circuit (character generator: CG) for screen display.

  FIG. 2 is a block diagram relating to image composition processing in the reproduction video signal processing circuit B2 in the present embodiment. In this figure, the video reproduced by the first reproduction unit for reproducing the tape is stored in the first reproduction image memory as image data subjected to a predetermined reproduction process in the reproduction processing circuit.

  Also, the video played back by the second playback unit that plays back the memory card is also stored in the second playback image memory as image data that has been subjected to a predetermined playback process in the playback processing circuit.

  When a composite image is displayed as an image selected by the operator, resizing processing is performed as a PinP image for both the main screen video data / sub-screen image data. SW1 to SW4 are operation switches. The PinP playback mode is activated by the PinP playback ON / OFF switch SW1, and the PinP playback is enabled. On the other hand, by pressing the parent screen selection switch SW2 and the child screen selection switch SW3, it is selected which video is used as the parent / child screen, and the screen configuration information is determined by the image determination switch SW4.

  In addition, the image comparison circuit that obtains the frame rate information of each reproduction signal from the reproduction processing circuit of the first reproduction unit and the reproduction processing circuit of the second reproduction unit has a higher frame rate of the parent screen or the child screen. Based on the comparison result, the recording frame rate information is transmitted to the image composition circuit so as to set the earlier frame rate as the frame rate for the composite image to be PinP synthesized.

  In the image composition circuit, composition processing is performed by the image composition memory using the transmitted frame rate information, and the synthesized image is transmitted to the LCD panel V1 and the color viewfinder V2 as reproduced image signals S1 and S2, respectively, and displayed.

  FIG. 3A is a flowchart of processing executed by the microcomputer in the system controller B1 that controls the recording / reproducing apparatus of the present invention. The procedure for determining the frame rate and synthesizing the reproduced image of the recording / reproducing apparatus described with reference to FIGS. 1 and 2 will be described with reference to this flowchart.

[Step 1]
The frame rate information obtained from the reproduction processing circuits of the first reproduction and the second reproduction shown in FIG. 2 is compared, and if the frame rate of the first reproduction unit is faster, step 2 and the frame rate of the second reproduction unit are faster. If so, the process branches to step 3.

[Step 2]
In step 2, the frame rate of the first reproduced image is transmitted to the image composition circuit, and the process proceeds to step 4.

[Step 3]
In step 3, the fame rate of the second reproduced image is transmitted to the image composition circuit, and the process proceeds to step 4.

[Step 4]
In step 4, a check is made as to whether the main playback video as the parent screen of the PinP image is the first playback unit or the second playback unit. If the playback unit is the first playback unit, step 5 and second playback unit are checked. In this case, the process branches to step 6.

[Step 5]
In step 5, when an image of the first reproduction unit is selected as the PinP master screen, the video signal from the first reproduction unit is transferred to the image synthesis memory by the synthesis processing circuit shown in FIG. The video signal from the second reproduction unit is resized in the image memory and then transmitted to the address corresponding to the PinP position in the image composition memory. At this time, the video signal is transferred to the image composition memory at a rate according to the faster frame rate already transmitted. Further, after adding the character information ““ simultaneous reproduction (first) ”display” generated by the character generator and indicating the state in which the image is displayed, the LCD panel / EVF has a display 1 (b). Is displayed.

[Step 6]
In step 6, when the image of the second reproduction unit is selected as the PinP master screen, the video signal from the second reproduction unit is resized in the image memory by the synthesis processing circuit shown in FIG. Is transferred to the image composition memory, and the video signal from the first reproduction unit is resized on the image memory and then transferred to the address corresponding to the PinP position in the image composition memory. . At this time, the video signal is transferred to the image composition memory at a rate according to the faster frame rate already transmitted. Further, after adding the character information ““ simultaneous reproduction (second) ”display” generated by the character generator and indicating the state in which the image is displayed, the LCD panel / EVF has a display 2 (b). Is displayed.

  With the configuration as described above, it is possible to display a composite video by unifying the frame rate of videos reproduced from a plurality of playback units in a faster direction.

  FIG. 4 is a drawing of a recording / reproducing apparatus that best represents the features of the second aspect of the present invention. The difference from the first embodiment is that, in the first embodiment, reproduced images from a plurality of reproducing units such as a cassette tape M1, an SD card or an MMC card M2 are used, whereas in this embodiment, an M3 DVD or the like is used. The reproduction means that can read out at a higher speed than the reproduction frame rate is used.

  In FIG. 4, M3 is a DVD playback unit comprising a disc-shaped recording medium such as a DVD and its drive, and B2 is a playback video signal processing circuit that converts the video signal played back from the DVD playback unit M3 into a video signal. In addition, since description about the structure of the same sign as Example 1 is the same as that of Example 1, it abbreviate | omits.

  FIG. 5 is a block diagram relating to image composition processing in the reproduction video signal processing circuit B2 in the present embodiment. In this figure, the first video played back by the DVD playback unit M3 is stored in the playback image memory as first image data that has been subjected to a predetermined playback process in the playback processing circuit.

  The second video reproduced in a time-sharing manner from the first image is also stored in the reproduction image memory as second image data that has been subjected to a predetermined reproduction process in the reproduction processing circuit. Note that the DVD playback unit M3 reads the first video and the second video from the DVD in a time-sharing manner at a speed higher than double speed, and adjusts the timing using a buffer (not shown) so that both real-time playback and simultaneous playback are possible. Playback is possible.

  When a composite image is displayed as an image selected by the operator, resizing processing is performed as a PinP image for both the main screen video data / sub-screen image data. SW1 to SW4 are operation switches. The PinP playback mode is activated by the PinP playback ON / OFF switch SW1, and the PinP playback is enabled. On the other hand, by pressing the parent screen selection switch SW2 and the child screen selection switch SW3, it is selected which video is used as the parent / child screen, and the screen configuration information is determined by the image determination switch SW4.

  In addition, the image comparison circuit that obtains each frame rate information related to a plurality of playback images read from the playback processing circuit compares and determines whether the frame rate of the parent screen or the child screen is higher. Based on the comparison result, the recording frame rate information is transmitted to the image synthesis circuit so that the earlier frame rate is set as the frame rate for the synthesized image to be PinP synthesized.

  In the image composition circuit, composition processing is performed by the image composition memory using the transmitted frame rate information, and the synthesized image is transmitted to the LCD panel V1 and the color viewfinder V2 as reproduced image signals S1 and S2, respectively, and displayed.

  FIG. 6A is a flowchart of the processing executed by the microcomputer in the system controller B1 that controls the recording / reproducing apparatus of the present invention. The frame rate determination / reproduction image synthesis procedure of the recording / reproducing apparatus described with reference to FIGS. 4 and 5 will be described with reference to this flowchart.

[Step 1]
The frame rate information obtained from the reproduction processing circuit shown in FIG. 5 is compared, and the process branches to step 2 if the frame rate of the first reproduction image is faster and to step 3 if the frame rate of the second reproduction image is faster.

[Step 2]
In step 2, the frame rate of the first reproduced image is transmitted to the image composition circuit, and the process proceeds to step 4.

[Step 3]
In step 3, the fame rate of the second reproduced image is transmitted to the image composition circuit, and the process proceeds to step 4.

[Step 4]
In step 4, it is checked whether the selection of the main playback video as the main screen of the PinP image is the first playback image or the second playback image. In the case of the first playback image, step 5 and second playback image are checked. In this case, the process branches to step 6.

[Step 5]
In step 5, when the image of the first reproduction image is selected as the PinP master screen, the image data of the first reproduction image is transferred to the image composition memory by the composition processing circuit shown in FIG. The second replay image is transferred to the address corresponding to the PinP position in the image composition memory after data resizing processing is performed on the image memory. At this time, the video signal is transferred to the image composition memory at a rate according to the faster frame rate already transmitted. Further, after adding the character information ““ simultaneous reproduction (first) ”display” generated by the character generator and indicating the state in which the image is displayed, the LCD panel / EVF has a display 1 (b). Is displayed.

[Step 6]
In step 6, when the image of the second reproduction image is selected as the PinP parent screen, the image data of the second reproduction image is resized on the image memory by the synthesis processing circuit shown in FIG. Then, the image data of the first reproduced image is resized on the image memory and then transferred to an address corresponding to the PinP position in the image composition memory. At this time, the image data is transferred to the image composition memory at a rate according to the faster frame rate already transmitted. Further, after adding the character information ““ simultaneous reproduction (second) ”display” generated by the character generator and indicating the state in which the image is displayed, the LCD panel / EVF has a display 2 (b). Is displayed.

  With the configuration as described above, it is possible to display the composite video by unifying the frame rate of the video in which a plurality of videos are played back by the common playback unit at a higher speed.

1 is a block diagram of a recording / reproducing apparatus in Embodiment 1. FIG. 3 is a block diagram of an image composition processing circuit in the video signal processing circuit in Embodiment 1. FIG. 6 is a flowchart (a) of processing executed by the microcomputer and display examples (b) and (c) according to the first embodiment. FIG. 6 is a block diagram of a recording / reproducing apparatus in Embodiment 2. 10 is a block diagram of an image composition processing circuit in a video signal processing circuit in Embodiment 2. FIG. 9 is a flowchart (a) of processing executed by the microcomputer and display examples (b) and (c) according to the second embodiment.

Explanation of symbols

V1 LCD panel V2 Color viewfinder B1 System controller B2 Playback video signal processing circuit block
B3 JPEG / MPEG processing / SD / MMC card controller B5 Character signal generator SW1 PinP playback ON / OFF switch SW2 Parent screen selection switch SW3 Sub-screen selection switch SW4 Image determination switch M1 Cassette tape M2 SD / MMC Memory card M3 DVD playback section S1 V1 playback video signal S2 V2 playback video signal

Claims (5)

  First reproduction means capable of reproducing a video signal, second reproduction means capable of reproducing a video signal, first reproduction signal reproduced by the first reproduction means, and second reproduction means Comparing means for comparing each frame rate of the second reproduction signal reproduced in the above, image synthesizing means for synthesizing the images of the reproduced signals, and control means for controlling the image synthesizing process in the image synthesizing means , And the control means is a composite image of the first reproduction signal and the second reproduction signal in the image synthesis means based on a frame rate determined from the comparison result in the comparison means. And a recording / reproducing apparatus for controlling to generate.   2. The recording / reproducing apparatus according to claim 1, wherein the comparing means compares the frame rates of the first reproduction signal and the second reproduction signal to determine the faster frame rate.   Reproduction means capable of reproducing a plurality of video signals, comparison means for comparing the frame rates of the first reproduction signal and the second reproduction signal reproduced by the reproduction means, and image synthesis of each reproduction signal In the recording / reproducing apparatus having the image synthesizing means and the control means for controlling the image synthesizing process in the image synthesizing means, the control means is based on the frame rate determined from the comparison result in the comparing means. Then, the recording / reproducing apparatus controls to generate a synthesized image of the first reproduction signal and the second reproduction signal in the image synthesis means.   4. The recording / reproducing apparatus according to claim 3, wherein the comparison means compares the frame rates of the first reproduction signal and the second reproduction signal to determine the faster frame rate.   5. The display device according to claim 1, further comprising display means capable of displaying a video signal, wherein the display means displays the video synthesized by the synthesis means in a picture-in-picture format. Recording / playback device.

Images