JP2012089962A - Image reproduction device and image reproduction method - Google Patents

Abstract

Provided is a video reproducing apparatus capable of performing video signal processing suitable for video characteristics of 2D video and 3D video when displaying an input video signal.
An image reproduction apparatus for reproducing a video signal in a three-dimensional format or a two-dimensional format, an NR processing unit that performs noise reduction processing (hereinafter referred to as NR processing) on the video signal, and reproduction of the video signal The setting unit that sets the format to the two-dimensional format or the three-dimensional format, and the NR processing unit, when performing noise reduction processing when reproducing the video signal by setting the three-dimensional format, the same video signal in the two-dimensional format NR processing is stronger than when NR processing is performed during reproduction.
[Selection] Figure 1

Description

  The present invention relates to a video playback apparatus and video playback method for displaying 3D video or 2D video.

  Conventionally, various methods have been proposed as a method for encoding 3D video. Here, the first viewpoint video signal (hereinafter referred to as the first viewpoint video signal) and a second viewpoint video signal different from the first viewpoint (hereinafter referred to as the second viewpoint video signal) are configured. The video signal is referred to as 3D video. One of the first viewpoint video signal and the second viewpoint video signal is a video signal for the right eye, and the other is a video signal for the left eye. A video signal composed only of the video signal of the first viewpoint is referred to as 2D video.

  As an example of a method for encoding 3D video, the first viewpoint video signal is encoded in the same manner as 2D video, and the second viewpoint video signal is used with the picture of the first viewpoint video signal at the same time as a reference picture. A method for performing motion compensation has been proposed (hereinafter referred to as a parallax compensation method). This method has an advantage that encoding can be performed without lowering the resolution of the first viewpoint video signal and the second viewpoint video signal, compared with the case of encoding 2D video.

  As another example, the first viewpoint video signal and the second viewpoint video signal are respectively reduced in half in the horizontal direction, the reduced video signals are arranged on the left and right, and encoded in the same manner as 2D video. A method has been proposed (hereinafter referred to as a side-by-side method). In this case, the encoded stream of 2D video and the encoded stream of 3D video are discriminated by adding information indicating that the video is 3D video to the header information of the encoded stream.

  In the conventional patent document 1, encoding is performed for calculating each quantization value so that the quantization value of the front image (large parallax) is decreased and the quantization value of the rear image (small parallax) is increased. An apparatus is described.

JP-A-6-113334

  By the way, when viewing a 3D image having a large difference in information perceived by both eyes, such as a vertical shift, a tilt shift, or a size shift between the left and right videos, it is difficult for the viewer to recognize the 3D video. It is known to be. When viewing 3D video with compression distortion due to compression coding, the appearance of coding distortion such as block noise and mosquito noise differs between the left and right videos. For this reason, cognitive contradiction arises and the subject that it is easy to get tired generate | occur | produces rather than the image | video without compression distortion.

  In digital broadcasting, a stream obtained by compressing and encoding a video signal is broadcast, and the video signal is displayed and reproduced by compressing and decoding the stream on the receiver side. The bit rate of the stream to be broadcast differs depending on the form of terrestrial digital broadcasting, BS broadcasting, etc., but the stream encoded video such as music program or sports program is the stream encoded video such as news program or animation program More scenes with higher quantization widths.

  In such a scene with a high quantization width, the image quality deteriorates due to the occurrence of compression distortion. As a result, there is a problem that it becomes difficult for the user to recognize the 3D video.

  The present invention has been made to solve such a problem. An image reproducing apparatus capable of performing video processing suitable for the video characteristics of 2D video and 3D video when displaying an input video signal. For the purpose of provision.

  In order to solve the above problems, a video playback apparatus of the present invention is a video playback apparatus that plays back a video signal in a three-dimensional format or a two-dimensional format, and performs noise reduction processing (hereinafter referred to as NR processing) on the video signal. An NR processing unit, a setting unit for setting the playback format of the video signal to a two-dimensional format or a three-dimensional format, and the NR processing unit for noise reduction when the video signal is played back in the three-dimensional format. In the case of processing, NR processing is performed more strongly than when NR processing is performed when reproducing the same video signal in a two-dimensional format.

  In this way, it is possible to change the strength of the NR process between when the video signal is reproduced in the three-dimensional format and when the video signal is reproduced in the two-dimensional format. In particular, when the same video signal is reproduced, the strength of the NR process can be increased in the case of reproducing in the three-dimensional format compared with the case of reproducing in the two-dimensional format. Thereby, even if the video signal reproduced in the two-dimensional format subjected to the NR process is changed to the reproduction of the three-dimensional format, the video signal can be recognized in the three-dimensional format without a sense of incongruity.

  Preferably, the NR processing unit has a plurality of noise reduction modes (hereinafter referred to as NR modes) having different NR processing intensities, and each NR mode is a first when reproducing a video signal in a two-dimensional format. A mode for performing NR processing at an intensity of 1 (hereinafter referred to as a two-dimensional mode) and a mode for performing NR processing at a second intensity higher than the first intensity when reproducing a video signal in a three-dimensional format (hereinafter referred to as three-dimensional) Mode).

  In this way, when displaying the video signal, the user can change the strength of the NR process step by step. Further, in each mode, when the same video signal is reproduced, the intensity of the NR process can be increased in the case of reproducing in the three-dimensional format as compared with the case of reproducing in the two-dimensional format. Thereby, it is possible to adjust the strength of the NR process according to the degree of uncomfortable feeling that the user feels when viewing the video signal in a three-dimensional format.

  Preferably, the intensity of the NR process in the three-dimensional mode included in the first NR mode among the plurality of NR modes is higher than the intensity of the NR process set in the first NR mode. It is weaker than the strength of the NR process in the two-dimensional mode included in.

  In this way, after setting the strength of the NR processing globally, the strength of the NR processing can be changed between the two-dimensional format and the three-dimensional format based on the set strength of the NR processing. Accordingly, even if the user changes the video signal from the two-dimensional format to the three-dimensional format, the video signal can be reproduced in the three-dimensional format without greatly changing the image quality of the video signal.

  Preferably, the NR processing unit has a plurality of noise reduction modes (hereinafter referred to as NR mode), and further, the NR processing unit further changes the reproduction format from a two-dimensional format to a three-dimensional format. The mode is changed to the NR mode in which the strength of the NR process is stronger than that in the two-dimensional format.

  In this way, the user can automatically adjust the strength of the NR process only by changing the playback format from the 2D format to the 3D format. As a result, when the video signal being played back in the two-dimensional format for which NR processing is performed is changed to the playback in the three-dimensional format, the user can automatically view the video signal suitable for the three-dimensional format. Become.

  Preferably, the NR processing unit turns NR processing from OFF to ON when reproducing the video signal in a three-dimensional format.

  In this way, even when the NR processing is turned off in the two-dimensional format, the NR processing can be turned on when the mode is changed to the three-dimensional format. As a result, it is possible to automatically cope with compression distortion or the like that is recognized for the first time when the user reproduces the video signal in a three-dimensional format.

  Preferably, the NR processing unit includes a plurality of noise reduction modes (hereinafter referred to as NR modes) having different noise reduction processing intensities, and the NR processing unit further turns on the NR processing when the NR processing is turned on. Of the plurality of NR modes, the NR mode having the weakest NR processing intensity is set.

  In this way, even if the user changes the video signal from the two-dimensional format to the three-dimensional format, the video signal can be reproduced in the three-dimensional format without greatly changing the image quality of the video signal.

  According to the video reproduction apparatus of the present invention, when displaying an input video signal, it is possible to perform video processing suitable for each video characteristic of 2D video and 3D video.

The figure which shows the whole structure of the television apparatus 1 in this embodiment. Functional block diagram of the signal processing unit 104 according to the present embodiment The flowchart which shows an example of the process which the signal processing part 104 which concerns on this embodiment performs. The figure showing an example of the intensity | strength of NR which the NR process part 203 in this embodiment sets The figure showing an example of the intensity | strength of NR which the NR process part 203 in this embodiment sets The figure showing an example which displays the setting information of television in this embodiment

(Embodiment 1)
<1. Regarding the first embodiment>
<1-1. Television equipment and peripheral equipment>
Hereinafter, the television apparatus 1 in Embodiment 1 will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating an overall configuration of the television apparatus 1. As shown in FIG. 1, the television device 1 is connected to an HDD device 4, an SD card 5, and an antenna 6. The television apparatus 1 inputs video signals output from the BD disk 3, the HDD apparatus 4, the SD card 5, and the antenna 6. The video signal is processed and displayed as an actual video.

  In addition, the television device 1 receives a user signal output from the remote control device 2.

  The HDD device 4 is a recording device that accumulates video signals. The HDD device 4 can be realized by, for example, an external hard disk device.

  The SD card 5 is a recording medium that stores video signals. The SD card 5 can be realized by a semiconductor recording element such as an SD card or a memory card, for example.

  The antenna 6 has a function of receiving a video signal transmitted from the outside.

  The remote control device 2 is an operation device that receives an operation from a user. The remote control device 2 has a plurality of buttons that can be pressed. By operating this button, the remote control device 2 generates a signal. The remote control device 2 transmits the generated signal to the television device 1 via radio. Thereby, the television apparatus 1 can detect a user's operation.

<1-2. Specific configuration of TV device>
Hereinafter, a specific configuration of the television device 1 will be described with reference to the drawings.

  Specifically, the television device 1 includes a drive device 101, an input / output IF unit 102, a tuner 103, a signal processing unit 104, a receiving unit 105, a buffer memory 106, and a flash memory 107 as shown in FIG. And a display 108.

  The drive device 101 includes a disc tray, and reads a video signal from the BD disc 3 stored in the disc tray. When a video signal is input from the signal processing unit 104, the video signal is written to the BD disc 3 stored in the disc tray.

  The input / output IF unit 102 is an interface that enables connection between the HDD device 4 and the SD card 5. The input / output IF unit 102 can exchange control signals and video signals with the signal processing unit 104. The input / output IF unit 102 transmits the input stream input from the HDD device 4 or the SD card 5 to the signal processing unit 104. Further, the input / output IF unit 102 transmits the encoded stream input from the signal processing unit 104 to the HDD device 4 or the SD card 5. For example, the input / output IF unit 102 can be realized by an HDMI connector, an SD card slot, a USB connector, or the like. In FIG. 1, one block is illustrated as the input / output IF 102, but a card slot for the SD card 5 and a connector for the HDD 4 may be provided. In short, the input / output IF unit 102 only needs to realize an interface with an external recording apparatus.

  The tuner 103 receives the broadcast wave received by the antenna 6. The tuner 103 transmits a video signal having a specific frequency designated by the signal processing unit 104 to the signal processing unit 104. As a result, the signal processing unit 104 can process a video signal of a specific frequency included in the broadcast wave and display it on the display 108.

  The signal processing unit 104 controls each unit of the television device 1. Further, the signal processing unit 104 has a decoding function of the video signal input from the input / output IF unit 102. The signal processing unit 104 is, for example, MPEG2 encoding standard or H.264. An input stream compressed and encoded using the H.264 / AVC encoding standard is decoded to generate a decoded video.

  In addition, the signal processing unit 104 has a playback mode for playing back decoded video as 2D video (hereinafter referred to as a 2D mode), a playback mode for playing back decoded video as 3D video (hereinafter referred to as a 3D mode), Has the function of setting. The signal processing unit 104 may be configured to set either the two-dimensional mode or the three-dimensional mode based on a signal from the remote control device 2. Further, the signal processing unit 104 may be configured to set either the two-dimensional mode or the three-dimensional mode based on meta information of the input stream.

  The signal processing unit 104 has a function of performing noise reduction processing (hereinafter referred to as NR processing) on the decoded video. Here, NR processing refers to video processing that reduces image quality degradation due to distortion or the like of an image included in decoded video. The NR process can be realized, for example, by a method of performing a filter process on a block distortion boundary. The NR process can be realized by a method of performing a low pass filter process on the decoded video. In short, the NR process may be any method as long as it is a process that reduces distortion included in the decoded video.

  Furthermore, the signal processing unit 104 sets the strength of NR processing. As the strength of the NR process is increased, the compression distortion of the decoded video can be reduced. However, as the intensity of NR processing increases, the degree to which the resolution of the video signal decreases increases. On the other hand, if the strength of the NR process is weakened, the distortion is not reduced much, but the degree to which the resolution of the video signal is reduced becomes small.

  The signal processing unit 104 has a plurality of noise reduction modes (hereinafter referred to as NR modes) having different NR processing intensities. For example, the signal processing unit 104 has three NR modes in which the strength of NR processing is classified into large, medium, and small. Note that the signal processing unit 104 is not limited to the above-described configuration, and may have a configuration having several types of NR modes such as four, five, etc. having different NR processing intensities.

  Furthermore, the signal processing unit 104 can set different NR processing in the two-dimensional mode and in the three-dimensional mode. For example, the strength of the NR process set in the three-dimensional mode is made higher than the strength of the NR process set in the two-dimensional mode. In addition, when the signal processing unit 104 has a plurality of NR modes as described above, the signal processing unit 104 has the NR processing strength used in the two-dimensional mode and the NR processing strength used in the three-dimensional mode in each NR mode.

  In this way, the NR process that can be set in the two-dimensional mode and the NR process that can be set in the three-dimensional mode are set differently, so that the NR suitable for each of the two-dimensional mode and the three-dimensional mode is set. Processing can be performed. For example, by making the strength of the NR processing set in the three-dimensional mode as described above stronger than the strength of the NR processing set in the two-dimensional mode, the uncomfortable feeling felt when viewing 3D video caused by compression distortion is reduced. Can do.

  The intensity of the NR process can be changed based on a signal from the remote control device 2.

  Further, the signal processing unit 104 performs various types of video processing other than the above-described NR processing, such as gradation correction processing, on the decoded video, and outputs a display signal that can be displayed on the display 108 to the display 108.

  The signal processing unit 104 may be configured with a microcomputer or a hard-wired circuit.

  The receiving unit 105 receives a signal from the remote control device 2 and transmits it to the signal processing unit 104. The receiving unit 105 can be realized by an infrared sensor, for example.

  The buffer memory 106 is used as a work memory when the signal processing unit 104 performs signal processing. The buffer memory 106 can be realized by a DRAM, for example.

  The flash memory 107 stores a program executed by the signal processing unit 104.

  The display 108 displays the display signal output from the signal processing unit 104 as a display screen. The display 108 can be realized by a liquid crystal display, for example.

<1-2-1. Signal Processing Unit 104>
Next, a specific configuration of the signal processing unit 104 will be described with reference to the drawings. Hereinafter, for convenience of explanation, the signal processing unit 104 will be described with respect to a configuration in which either the two-dimensional mode or the three-dimensional mode is set based on a signal from the remote control device 2.

  FIG. 2 is a functional block diagram of the signal processing unit 104 according to the present embodiment.

  As shown in FIG. 2, the signal processing unit 104 includes a control unit 201, a reproduction processing unit 202, an NR processing unit 203, and a screen generation unit 204. FIG. 2 shows an example of processing a stream input from the tuner 103 for convenience. Therefore, the signal input to the reproduction processing unit 202 is a signal received by the tuner 103. Although the description here is as described above for the sake of convenience, the signal input to the reproduction processing unit 202 may be a signal from the input / output IF unit 102 or the drive device 101.

  The control unit 201 controls the overall operation of the signal processing unit 104. For example, when receiving an instruction of the two-dimensional mode or the three-dimensional mode from the receiving unit 105, the control unit 201 sets the two-dimensional mode or the three-dimensional mode according to the instruction. For example, when receiving an instruction from the receiving unit 105 to display setting information of the television apparatus 1 such as the strength setting of the NR process, the control unit 201 causes the screen generation unit 204 to display a screen according to the instruction.

  The reproduction processing unit 202 decodes the input stream based on the control information of the control unit 201 to generate a decoded video. For example, when the control information indicating the two-dimensional mode is notified from the control unit 201, the reproduction processing unit 202 decodes the input stream and outputs the two-dimensional decoded video to the NR processing unit 203. Further, when the control information indicating the three-dimensional mode is notified from the control unit 201, the reproduction processing unit 202 decodes the input stream and outputs the three-dimensional decoded video to the NR processing unit 203. Note that the reproduction processing unit 202 may decode the input stream input from the drive device 101 and generate a decoded video. Further, when the input / output IF unit 102 is configured to be implemented by an HDMI connector, an uncompressed video signal different from the compression-coded stream is input. In this case, the reproduction processing unit 202 does not perform decoding processing, and outputs the input uncompressed video signal to the NR processing unit 203 as it is.

  The NR processing unit 203 performs NR processing on the decoded video generated by the playback processing unit based on the control information of the control unit 201. For example, when the control information indicating the two-dimensional mode is notified from the control unit 201, the NR processing unit 203 performs NR processing using the decoded video as a 2D video. In addition, when the control information indicating the three-dimensional mode is notified from the control unit 201, the NR processing unit 203 performs NR processing using the decoded video as a 3D video. The NR processing unit 203 outputs a video signal obtained by the NR processing to the screen generation unit 204.

  The screen generation unit 204 generates a screen for displaying the video signal output by the NR processing unit 203 on the display 108 based on the control information of the control unit 201. Further, the screen generation unit 204 determines whether to generate the screen to be generated in the two-dimensional mode or the three-dimensional mode based on the control information from the control unit 201.

<1-3. Operation flow>
Next, an input stream reproduction operation performed by the signal processing unit 104 will be described with reference to the drawings. For convenience of explanation, it is assumed that the signal processing unit 104 receives a broadcast wave via the tuner 103, processes it, and displays it on the display 108.

  FIG. 3 is a flowchart illustrating an example of processing executed when the signal processing unit 104 according to the present embodiment changes from the two-dimensional mode to the three-dimensional mode.

  Note that step S301 is a processing step performed by the user operating the remote controller 2, and step S302, step S303, step S304, step S305, step S306, step S307, and step S308 are processing steps performed by the television apparatus 1. It is.

  The remote control device 2 receives a user operation and transmits a signal indicating whether the mode is the two-dimensional mode or the three-dimensional mode (hereinafter referred to as a display mode) to the receiving unit 105 (S301). At this time, for example, the user operates the remote control device 2 while viewing the display 108 that displays a screen from which the display mode can be selected, and designates the display mode using a cursor displayed on the screen. At this time, the user presses the enter button on the remote control device 2. The remote controller 2 transmits a selection signal to the receiving unit 105 when the enter button is pressed.

  The control unit 201 receives a selection signal via the receiving unit 105 (S302). Then, the control unit 201 determines whether the mode is the two-dimensional mode or the three-dimensional mode based on the selection signal (S303). When the three-dimensional mode is set, the process proceeds to S304 and S305. On the other hand, when the two-dimensional mode is set, the process proceeds to S306 and S307.

  When the two-dimensional mode is set (No in step S303), the reproduction processing unit 202 decodes the input stream and generates a two-dimensional decoded video (S306). Then, the NR processing unit 203 performs NR processing on the decoded video in the two-dimensional mode (S307).

  On the other hand, when the three-dimensional mode is set (Yes in step S303), the reproduction processing unit 202 decodes the input stream and generates a three-dimensional decoded video (S304). Then, the NR processing unit 203 performs NR processing on the decoded video in the three-dimensional mode (S305).

  Finally, the screen generator 204 displays the video signal output from the NR processor based on the information obtained from the controller 201 (S308).

  Here, in S305 and S307, the processing executed in the NR processing differs between the two-dimensional mode and the three-dimensional mode. More specifically, the strength of the NR process set in the three-dimensional mode is made higher than the strength of the NR process set in the two-dimensional mode. By performing the NR process in this way, it is possible to reduce a sense of incongruity that is felt when viewing 3D video due to compression distortion.

  Note that the NR processing unit 203 may be configured to select from a plurality of NR modes having different NR processing operations and intensities. For example, the user is configured to be able to select three basic NR modes. In this case, the first NR mode is set to have a low NR processing strength, the second NR mode has a medium NR processing strength, and the third NR mode has a high NR processing strength. Further, for each NR mode, the intensity in the two-dimensional mode and the intensity in the three-dimensional mode are set separately. That is, six patterns of NR modes are selectively applied as shown in FIG. In the figure, A, B, C, D, E, and F are the NR mode intensities of six patterns. Here, since the first NR mode is set to have a low intensity, the second NR mode is set to a high intensity, and the third NR mode is set to a high intensity, the magnitude relations of A <C <E, B <D < F. Further, in order to make the intensity of the NR process set in the three-dimensional mode stronger than the intensity of the NR process set in the two-dimensional mode, the magnitude relationship is A <B, C <D, E <F.

  Note that the intensity of the NR mode may be set so that A <B <C <D <E <F. In this case, for example, the intensity of the first NR mode in the three-dimensional mode is set smaller than the intensity of the second NR mode in the two-dimensional mode.

  Further, the intensity of the NR mode may be set so that A <C <E <B <D <F. In this case, the intensity of an arbitrary NR mode in the three-dimensional mode is set larger than the intensity of an arbitrary NR mode in the two-dimensional mode.

  Here, for example, as shown in FIG. 6, the user operates the remote controller 2 to display setting information such as the NR mode on the display, so that the currently selected NR mode is the first NR mode. It can be confirmed whether there is a second NR mode or a third NR mode. That is, the user cannot discriminate the setting difference between the intensity A and the intensity B, the intensity A and the intensity B, and the intensity E and the intensity F from the setting information displayed on the display. Note that the setting information displayed on the display may be only the type of NR mode (whether it is the first NR mode, the second NR mode, or the third NR mode). Further, when a plurality of parameters for adjusting the intensity of NR processing can be set, each parameter may be displayed. Furthermore, display setting information other than NR processing, such as contrast, may be displayed simultaneously.

  Note that the user can also change the three types of NR modes by operating the remote control device 2. The setting changed by the user can be returned to the initial setting before the user changes the setting by operating the remote control device 2. In addition, it is good also as a structure which a user can set independently the parameter which sets the intensity | strength of NR process instead of the structure which changes a mode.

  Further, for example, as shown in FIG. 5, the NR processing unit 203 is configured to share the NR modes prepared in the two-dimensional mode and the three-dimensional mode so that the three patterns of NR modes are selectively applied. Also good. In this case, for example, if the first NR mode is selected in the two-dimensional mode, the second or third NR mode is selected in the three-dimensional mode. The user can know whether the mode is the first mode, the second mode, or the third mode by displaying setting information such as the NR mode on the display. It is possible to explicitly determine that different NR modes are selected in the three-dimensional mode. Further, in this case, if the first NR mode is selected when the NR processing unit 203 is in the two-dimensional mode, the first NR mode remains unchanged in the three-dimensional mode, and only the strength of the NR process is changed. It doesn't matter. In this configuration, the user can confirm that the first NR mode is set on the display even in the two-dimensional mode and the three-dimensional mode. However, the strength of the NR process applied to the decoded signal is stronger when the three-dimensional mode is set than when the two-dimensional mode is set.

  Further, the NR processing may be turned off in the two-dimensional mode, and the NR processing may be turned on only in the three-dimensional mode. In this case, the strength of the NR process in the three-dimensional mode may be, for example, the weakest setting or other settings.

  Further, in the NR processing in the three-dimensional mode, the strength of the NR processing to be set may be changed between the NR processing executed for the first viewpoint video signal and the NR processing executed for the second viewpoint video signal. . For example, only the strength of the NR process performed on the first viewpoint video signal is made stronger than the strength of the NR process set in the two-dimensional mode, and the strength of the NR process performed on the second viewpoint video signal is A setting equivalent to the NR process set in the two-dimensional mode may be used.

  Note that the NR setting that can be set in the three-dimensional mode does not necessarily need to be set in the two-dimensional mode. For example, by preparing an NR process that can be used only in the three-dimensional mode in addition to the NR process in both the two-dimensional mode and the three-dimensional mode, the strength of the NR process set in the three-dimensional mode can be increased. A configuration in which the intensity of the NR process set in the two-dimensional mode is set to be stronger may be employed.

  In this way, by making the strength of the NR processing set in the three-dimensional mode stronger than the strength of the NR processing set in the two-dimensional mode, it is possible to reduce the uncomfortable feeling felt when viewing 3D video caused by compression distortion. It becomes.

<1-4. Summary>
The television apparatus 1 in this embodiment is a television apparatus 1 that reproduces a video signal in a three-dimensional format or a two-dimensional format, and an NR processing unit 203 that performs noise reduction processing (hereinafter referred to as NR processing) on the video signal. A control unit 201 that sets a video signal reproduction format to a two-dimensional format or a three-dimensional format, and the NR processing unit 203 performs noise reduction processing when reproducing a video signal by setting the three-dimensional format, When the same video signal is reproduced in a two-dimensional format, NR processing is performed more strongly than when NR processing is performed.

  In this way, it is possible to change the strength of the NR process between when the video signal is reproduced in the three-dimensional format and when the video signal is reproduced in the two-dimensional format. In particular, when the same video signal is reproduced, the strength of the NR process can be increased in the case of reproducing in the three-dimensional format compared with the case of reproducing in the two-dimensional format. Thereby, even if the video signal reproduced in the two-dimensional format subjected to the NR process is changed to the reproduction of the three-dimensional format, the video signal can be recognized in the three-dimensional format without a sense of incongruity.

  Preferably, the NR processing unit 203 has a plurality of NR modes having different NR processing intensities, and each NR mode is a mode for performing NR processing with a first intensity when reproducing a video signal in a two-dimensional format. And a mode for performing NR processing at a second intensity higher than the first intensity when the video signal is reproduced in a three-dimensional format.

  In this way, when displaying the video signal, the user can change the strength of the NR process step by step. Further, in each mode, when the same video signal is reproduced, the intensity of the NR process can be increased in the case of reproducing in the three-dimensional format as compared with the case of reproducing in the two-dimensional format. Thereby, it is possible to adjust the strength of the NR process according to the degree of uncomfortable feeling that the user feels when viewing the video signal in a three-dimensional format.

  Further preferably, the strength of the NR process of the three-dimensional mode included in the second NR mode is higher than the strength of the NR process set in the second NR mode of the two-dimensional mode included in the first NR mode. Weaker than processing intensity.

  In this way, after setting the strength of the NR processing globally, the strength of the NR processing can be changed between the two-dimensional format and the three-dimensional format based on the set strength of the NR processing. Accordingly, even if the user changes the video signal from the two-dimensional format to the three-dimensional format, the video signal can be reproduced in the three-dimensional format without greatly changing the image quality of the video signal.

  The NR processing unit 203 has a plurality of NR modes, and the NR processing unit 203 performs NR processing more than the NR mode in the two-dimensional format when the reproduction format is changed from the two-dimensional format to the three-dimensional format. Change to strong NR mode.

  In this way, the user can automatically adjust the strength of the NR process only by changing the playback format from the 2D format to the 3D format. As a result, when the video signal being played back in the two-dimensional format for which NR processing is performed is changed to the playback in the three-dimensional format, the user can automatically view the video signal suitable for the three-dimensional format. Become.

  Preferably, the NR processing unit 203 switches NR processing from OFF to ON when reproducing the video signal in a three-dimensional format.

  In this way, even when the NR processing is turned off in the two-dimensional format, the NR processing can be turned on when the mode is changed to the three-dimensional format. As a result, it is possible to automatically cope with compression distortion or the like that is recognized for the first time when the user reproduces the video signal in a three-dimensional format.

  Preferably, the NR processing unit 203 has a plurality of NR modes having different noise reduction processing intensities, and the NR processing unit 203 further selects an NR mode among the plurality of NR modes when the NR processing is turned on. The NR mode with the weakest processing intensity is set.

  In this way, even if the user changes the video signal from the two-dimensional format to the three-dimensional format, the video signal can be reproduced in the three-dimensional format without greatly changing the image quality of the video signal.

(Other embodiments)
As mentioned above, although the form of this embodiment was demonstrated, this invention is not limited to this.

  For example, in the present embodiment, the configuration is such that the user uses the remote control device 2 to specify whether the mode is the three-dimensional mode or the two-dimensional mode. Here, according to the program information obtained by receiving the broadcast wave, whether the mode is the three-dimensional mode or the two-dimensional mode may be set. Alternatively, it may be set from encoding information such as header information of the input stream obtained when the input stream is decoded. In addition, when the 3D video is a side-by-side format, matching processing may be performed on the left-eye image data and the right-eye image data, and the setting may be performed according to the obtained correlation degree.

  Further, in the present embodiment, a method of performing filter processing on the boundary of block distortion has been described as an example. Here, you may comprise so that intensity | strengths, such as a super-resolution process and an edge emphasis process, may be changed. However, in the case of super-resolution processing, edge enhancement processing, etc., the intensity is set to be smaller in the three-dimensional mode than in the two-dimensional mode.

  Further, in the present embodiment, it has been described that the user can change the strength of the NR process by operating the remote control device 2. Here, the strength of the NR processing in the two-dimensional mode and the strength of the NR processing in the three-dimensional mode may be changed independently. In this case, when the intensity of the NR process in the three-dimensional mode is changed to a setting smaller than the intensity of the NR process in the two-dimensional mode, a warning message may be displayed on the screen. Further, when the strength of the NR process in the three-dimensional mode is changed to a setting smaller than the initial strength, a warning message may be displayed on the screen.

  In the television apparatus, the 3D safety mode is provided, and the operation in the present embodiment is performed when the 3D safety mode is on. When the 3D safety mode is off, the NR mode that can be selected between 3D video and 2D video is selected. You may make it the structure which does not distinguish.

  In the present embodiment, the case where the apparatus is configured as a television apparatus has been described. However, the present invention can also be configured as an image reproducing apparatus such as a video player or a video camera capable of capturing both 3D video and 2D video.

  In addition, this embodiment can implement | achieve the video reproduction method which uses each means with which a video reproduction apparatus is equipped as each step, the video reproduction integrated circuit provided with each means with which a video reproduction apparatus is equipped, and a video reproduction method. It is also possible to provide a video playback program.

  The video reproduction program can be distributed via a recording medium such as a CD-ROM (Compact Disc-Read Only Memory) or a communication network such as the Internet.

  The video reproduction integrated circuit can be realized as an LSI which is a typical integrated circuit. In this case, the LSI may be composed of one chip or a plurality of chips. For example, the functional blocks other than the memory may be configured with a one-chip LSI. Although referred to as LSI here, it may be called IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.

  Further, the method of circuit integration is not limited to LSI, but may be realized by a dedicated circuit or a general-purpose processor, or an FPGA (Field Programmable Gate Array) that can be programmed after the LSI is manufactured, A reconfigurable processor that can reconfigure the connection and setting of circuit cells may be used.

  Furthermore, if integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology or a derivative other technology, it is naturally also possible to carry out function block integration using this technology. For example, it is considered possible to apply biotechnology.

  In addition, when the integrated circuit is formed, only the unit for storing data among the functional blocks may not be taken into the one-chip configuration but may be configured separately.

  Since the video reproduction apparatus according to the present invention can perform NR processing and display on the video signal so that the user can comfortably view 3D video, the digital television, video player, personal computer, mobile phone Applicable to etc.

DESCRIPTION OF SYMBOLS 1 Television apparatus 2 Remote control apparatus 3 BD disk 4 HDD apparatus 5 SD card 6 Antenna 101 Drive apparatus 102 Input / output IF section 103 Tuner 104 Signal processing section 105 Reception section 106 Buffer memory 107 Flash memory 108 Display 201 Control section 202 Playback processing section 203 NR processing unit 204 screen generation unit

Claims (6)

A video reproduction device for reproducing a video signal in a three-dimensional format or a two-dimensional format,
An NR processing unit that performs noise reduction processing (hereinafter referred to as NR processing) on a video signal;
A setting unit for setting the reproduction format of the video signal to a two-dimensional format or a three-dimensional format;
When the noise reduction processing is performed when reproducing a video signal set in a three-dimensional format, the NR processing unit performs video reproduction that performs NR processing more strongly than when performing the NR processing when reproducing the same video signal in a two-dimensional format. apparatus. The NR processing unit has a plurality of noise reduction modes (hereinafter referred to as NR modes) having different NR processing intensities,
Each NR mode includes a mode for performing NR processing with a first intensity when reproducing a video signal in a two-dimensional format (hereinafter referred to as a two-dimensional mode) and a first intensity when reproducing a video signal in a three-dimensional format. The video reproduction apparatus according to claim 1, further comprising a mode (hereinafter, referred to as a three-dimensional mode) that performs NR processing with a second intensity that is higher than the second intensity.   The strength of the NR processing in the three-dimensional mode provided in the first NR mode is higher than the strength of the NR processing in the two-dimensional mode provided in the second NR mode, which is stronger than the strength of the NR processing set in the first NR mode. The video reproducing apparatus according to claim 2, which is weak. The NR processing unit has a plurality of noise reduction modes (hereinafter referred to as NR modes),
2. The video reproduction according to claim 1, wherein the NR processing unit changes to an NR mode in which the intensity of NR processing is higher than that in the two-dimensional format when the reproduction format is changed from the two-dimensional format to the three-dimensional format. apparatus.   The video reproduction apparatus according to claim 1, wherein the NR processing unit turns NR processing from OFF to ON when reproducing the video signal in a three-dimensional format. The NR processing unit has a plurality of noise reduction modes (hereinafter referred to as NR modes) having different noise reduction processing intensities,
The video reproduction device according to claim 5, wherein the NR processing unit sets an NR mode having the weakest NR processing intensity among the plurality of NR modes when the NR processing is turned on.