JP2012054733A - Reproduction apparatus and reproduction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve usability in reproduction by a device which receives a three-dimensional display image.SOLUTION: In accordance with switching of a reproduction speed, a control unit controls a reproduction control unit, a decoding processing unit, and an output processing unit and properly switches between three-dimensional display and two-dimensional display. When an input stream can three-dimensionally be displayed in part, the control part properly switches between three-dimensional display and two-dimensional display in accordance with information included in the stream and indicating whether three-dimensional display is possible.

Description

  The technical field relates to a playback apparatus for playing back digital video information.

  Regarding the above technical field, Patent Document 1 has an object of “providing a 3D image display system that allows a user to view a 3D image even when paused during playback”. The video playback device 101 that plays back the left and right video signals recorded in this manner, the memories 105 and 106 that record the left and right video signals played back by the video playback device 101, and the memories 105 and 106, respectively. A switch 107 for switching the left and right video signals to output at a predetermined cycle, and a control for prohibiting writing to the memories 105 and 106 when the reproduction of the recorded left and right video signals is paused A display unit 109, which performs display based on the video signal switched and output by the switch 107 ". It has been mounting.

JP 2002-95017 A

  In recent years, there has been an increasing demand to enjoy 3D (three-dimensional) video at home, and reproduction of 3D content by a Blu-ray (registered trademark) disc player has been implemented.

  It is also assumed that 3D content is transmitted by broadcast waves, 3D video is displayed by a receiver, and a 3D content recorded on the recording medium is reproduced by mounting or externally adding a recording medium to the broadcast receiving device. Is done.

  Here, even if the 3D content is reproduced from the recording medium, it is preferable that the user's usability in the conventional content reproduction (2D content reproduction) can be maintained and improved.

  Patent Document 1 discloses a method for maintaining stereoscopic video display even when the stereoscopic video display is temporarily stopped. However, Patent Document 1 does not describe special playback (playback different from normal playback (single-speed playback) such as fast-forward playback and rewind playback) when content including 3D video is read from a recording medium and viewed. .

  For this reason, when special playback of content including 3D video is performed, video that is unpleasant for the user may be played back, which is less convenient for the user than playback of conventional content.

  In order to solve the above problems, for example, the configuration described in the claims is adopted.

  The present application includes a plurality of means for solving the above problems. For example, when receiving an instruction to change the playback speed while playing back video data as 3D video, the video data is played back. It is characterized by switching to playback as 2D video.

  According to the above means, it is possible to improve the convenience of the user regarding special playback of content including 3D video.

Schematic diagram showing a system configuration example Schematic diagram showing an example of the configuration of the sending device Block diagram showing an example of the configuration of a recording / reproducing apparatus Schematic diagram showing an example of processing during viewing and recording Schematic diagram showing an example of processing during viewing and recording Schematic diagram showing an example of processing during viewing and recording Schematic diagram showing an example of processing during playback Schematic diagram showing an example of processing during playback Schematic diagram showing an example of processing during playback Sequence diagram showing an example of a processing sequence for switching playback methods Sequence diagram showing an example of a processing sequence for switching playback methods Sequence diagram showing an example of a processing sequence for switching playback methods Schematic diagram showing an example of menu display of the recording / reproducing apparatus Sequence diagram showing an example of a processing sequence for switching playback methods Block diagram showing an example of the configuration of a recording / reproducing apparatus Block diagram showing an example of the configuration of a recording / reproducing apparatus

  Hereinafter, examples (examples) of the preferred embodiments of the present invention will be described. However, the present invention is not limited to this embodiment. In the following examples, 3D means three dimensions and 2D means two dimensions. For example, 3D video refers to video that allows a viewer to perceive an object in a three-dimensional manner as if it were in the same space by presenting video with parallax to the left and right eyes. means. For example, 3D content is content including a video signal that enables 3D video display by processing by a 3D display device.

  As a method for displaying a 3D image, there are an anaglyph method, a polarization display method, a frame sequential method, a parallax barrier method, a lenticular lens method, a microlens array method, a light beam reproduction method, and the like.

  The anaglyph method is a method in which videos taken from different angles on the right and left are played back with red and blue light, and viewed with glasses with red and blue color filters on the left and right (hereinafter also referred to as “anaglyph glasses”). It is.

  The polarization display method is a method in which linearly polarized light orthogonal to the left and right images is projected and superimposed, and this is separated by glasses with a polarization filter (hereinafter also referred to as “polarized glasses”).

  With the frame sequential method, glasses taken from different angles on the left and right are played back alternately, and glasses with shutters that alternately block the left and right fields of view (they do not necessarily have to take the shape of glasses; This is a device that can control the light transmission of the elements inside, and is also referred to as “shutter glasses”.

  The parallax barrier method is a method in which the right-eye image is displayed on the right eye and the left-eye image is displayed on the left eye by overlaying a vertical stripe barrier called “parallax barrier” on the display. There is no need to wear special glasses. The parallax barrier method can be further classified into a two-viewpoint method with a relatively narrow viewing position, a multi-viewpoint method with a relatively wide viewing position, and the like.

  The lenticular lens method is a method in which the right eye is displayed on the right eye and the left eye is displayed on the left eye by overlaying the lenticular lens on the display, and the user must wear special glasses. There is no. The lenticular lens method can be further classified into a two-viewpoint method in which the viewing position is relatively narrow, a multi-viewpoint method in which the viewing position is relatively wide on the left and right.

  The microlens array system is a system that displays a right-eye image on the right eye and a left-eye image on the left eye by overlaying the microlens array on the display, and the user wears special glasses. There is no need to do. The microlens array method is a multi-viewpoint method in which the viewing position is relatively wide vertically and horizontally.

  The light beam reproduction method is a method of presenting a parallax image to an observer by reproducing the wavefront of a light beam, and the user does not need to wear special glasses or the like. Also, the viewing position is relatively wide.

  Note that the 3D video display method is merely an example, and other methods may be employed. In addition, tools and devices necessary for viewing 3D video, such as anaglyph glasses, polarized glasses, shutter glasses, etc. are collectively referred to as 3D glasses, 3D viewing devices, or 3D viewing aids.

  FIG. 1 is a schematic diagram illustrating an example of the configuration of a system to which this embodiment is applied. The case where the information from a broadcast wave is received is illustrated. However, it is not limited to broadcasting, but may be IP broadcasting (multicast) over a communication network, and is also collectively referred to as distribution.

  1 is a transmission device installed in an information providing station such as a broadcasting station, 2 is a broadcasting satellite, 3 is a relay device installed as a terrestrial relay station, and 4 is a recording / reproducing device installed in the user's house (display) Device). A distribution server 5 distributes data for IP broadcasting. Reference numeral 6 denotes a recording / reproducing apparatus such as a BD recorder installed in the user's home. 7 is 3D glasses.

  The transmission device 1 transmits the modulated signal radio wave via the relay devices 2 and 3. For example, transmission using a cable or transmission using a telephone line may be used. This signal radio wave received by the recording / reproducing apparatus 4 is demodulated into an information signal as described later.

  In this configuration, since the recording / reproducing apparatus 4 has a display, the user can view the video and audio indicated by the information signal. Although not described in FIG. 1, the recording / reproducing apparatus 4 can record and reproduce the data received by the recording / reproducing unit included in the recording medium.

  The recording / reproducing apparatus 4 can transmit / receive data to / from another recording / reproducing device 6. Both of them have a connection capable of transmitting and receiving digital data including 3D video information such as an HDMI cable, for example, transferring information signals received to the recording / reproducing device 6 and receiving information signals received from the recording / reproducing device 6. Playback can be performed by the recording / playback apparatus 4.

  FIG. 2 is a block diagram showing an example of the configuration of the transmission device 1 in the system shown in FIG.

  Reference numeral 201 denotes a source generation unit, 202 denotes an encoding unit that performs compression using the MPEG method, 203 denotes a scramble unit, 204 denotes a modulation unit, 205 denotes a transmission antenna, and 206 denotes a program information addition unit. Information such as video and audio generated by the source generation unit 201 including a camera and a recording / playback device is compressed by the encoding unit 202 so that it can be transmitted in a smaller occupied band. If necessary, the scrambler 203 performs transmission encryption so that it can be viewed by a specific viewer. After being modulated to be a signal suitable for transmission by the modulation unit 204, the signal is transmitted from the transmission antenna 205 to the relay device 2 as a radio wave. At this time, the program information adding unit 206 adds program information for display of, for example, an electronic program guide or program information currently being viewed.

  In many cases, a plurality of pieces of information are multiplexed in one radio wave by a method such as time division or spread spectrum. Although not shown in FIG. 2 for simplicity, in this case, there are a plurality of systems of the source generation unit 201 and the encoding unit 202, and a multiplex that multiplexes a plurality of information between the encoding unit 202 and the scramble unit 203. Part (multiplexing part) is placed.

  Various methods are conceivable as a method for realizing transmission / reception of 3D video. For example, as an example of a method of transmitting 3D video, there is a method of multiplexing and transmitting left-eye image data and right-eye image data. If the operation mode of transmission and reception is determined so that it can be discriminated at the time of reception, the receiver can determine that it is a 3D image according to the operation mode and display a 3D image.

  FIG. 3 is a block diagram showing an example of the configuration of the recording / reproducing apparatus 4. Reference numeral 301 denotes an input terminal for receiving transmission data transmitted from the broadcasting apparatus 1 and transmitted through the relay station 2 or 3. Reference numeral 302 denotes a broadcast receiving unit. When the input is scrambled data such as a broadcast stream, the scramble processing is performed and the data is output.

  A separation unit 303 analyzes the received data, separates the data for each data type, and transfers the separated data to the subsequent stage. As a separation procedure, PAT (Program Association Table) data having a predetermined numerical value (for example, 0) as an ID (Identifier) is detected from the input digital data and analyzed based on a predetermined method. An ID of a PMT (Program Map Table) is obtained. Using the information, PMT data is detected from the input digital data and analyzed based on a predetermined method. Thereby, it is possible to know the ID of data (for example, EIT (Event Information Table)) including video data, audio data, and program information (also referred to as SI (Service Information) information). As described above, it is possible to sort the data by type. For example, video data / audio data is extracted and transferred to the subsequent decoding processing unit 305. The program information is transferred to the program information processing unit 304. When recording, necessary data determined by the standard is transferred to the data conversion processing unit 308. For example, according to the ARIB standard, video recording is defined to be recorded in a partial TS (Transport Stream) format, and necessary program information and data format are defined at this time.

  The program information processing unit 304 acquires part of information in the descriptor such as EIT, and stores the information in the memory 317 so that the control unit 316 and the data conversion processing unit 308 can use the information.

  The decode processing unit 305 decodes the separated video data / audio data into video data to be displayed on a screen or audio data output from a speaker. Although not shown in the figure, there are separate blocks for decoding video and audio in the decoding processing unit. The decoded data is sent to the display control unit 306.

  A display control unit 306 generates output data from video / audio data and display data of various application interfaces (IF). For example, a display image is generated by superimposing, for example, an OSD (On Screen Display) such as a menu screen, which is uniquely prepared by the recording / reproducing apparatus 4, on the video data processed by the decoding processing unit 305. It is assumed that the display control unit 306 corresponds to at least one 3D video display method.

  An output terminal 307 transfers output data generated by the display control unit 306 to a display device such as a display liquid crystal panel.

  A data conversion processing unit 308 records digital data on the recording medium 312. The input broadcast format stream is converted into a predetermined partial TS format by deleting unnecessary information such as EIT at the time of recording, and generating necessary SIT from previously obtained information. The program information required in the partial TS format conforms to the standard if determined by the standard. The data conversion processing unit 308 can convert the size of the angle of view and the data format in order to reduce the recording capacity.

  Reference numeral 309 denotes an encryption / decryption processing unit, which encrypts input digital data into a predetermined encryption method by using, for example, key information designated by the control unit 316 at the time of recording. On the other hand, at the time of reproduction, the data recorded on the recording medium 312 is decoded into a stream that can be decoded. This prevents unauthorized use of the recorded stream.

  A recording / reproduction control unit 310 issues a command for recording data on the recording medium 312 or reproducing a stream recorded on the recording medium 312 and performs processing such as transfer of digital data. Reference numeral 311 denotes an input / output terminal for transmitting / receiving data to / from the recording medium 312.

  Reference numeral 312 denotes a recording medium. In FIG. 3, the recording medium 312 is arranged outside the recording / reproducing apparatus 4, but it may be included in the recording / reproducing apparatus 4. In FIG. 3, the playback path is also shown. For example, the data read from the recording medium 312 via the recording / playback unit 310 is processed by the encryption / decryption processing unit 309, and the output data is sent to the separation unit 303. Forward. At this time, when digital data that does not need to be decoded (hereinafter also referred to as a recorded program) is handled, it may be transferred to the separation unit 303 without going through the encryption / decryption processing unit 309. Further, the data may be transferred to the separation unit 303 without going through the data conversion processing unit 308.

  Reference numeral 313 denotes a remote controller IF (Interface) used when the user performs an operation using the remote controller. Reference numeral 314 denotes an input terminal, for example, a light receiving unit that receives a signal from a remote controller.

  Reference numeral 315 denotes an operation unit for providing a group of buttons for performing various operations such as a channel selection operation and a volume operation, and for controlling the recording / reproducing apparatus 4 by a user directly operating the buttons. Reference numeral 316 denotes a control unit that controls the operation of the recording / reproducing apparatus 4 and is configured by a CPU, for example. Reference numeral 317 denotes a memory for recording information.

  Reference numeral 318 denotes a display control timing for the 3D glasses 7 when the recording / reproducing apparatus 4 includes a display device or can be interlocked with the display timing of the display device and when shutter glasses are required as a 3D viewing method. It is a synchronization control unit that generates and sends out a signal for notifying the combined shutter opening / closing timing.

  Reference numeral 319 denotes an output terminal, which transmits and receives control signals to and from the 3D glasses 7 by connection with, for example, infrared communication or a wired cable. Unlike the example shown in FIG. 1, if the display device is separate from the recording / reproducing device, the display timing is controlled by the display device, so that the synchronization control unit 318 and the output terminal 319 are unnecessary. Reference numeral 320 denotes a system bus through which data is transmitted / received between the blocks.

  In addition, the line shown by the arrow which connects each block in FIG. 3 is the flow of the received digital data. Since data is appropriately processed in each block, the contents and format of data flowing between the blocks are different.

  The following examples will be described based on the above configuration. It is assumed that the received digital information includes information for determining which program includes 3D video. For example, suppose that EIT includes information indicating whether a 3D video is included in a program.

  Alternatively, for example, consider transmitting information including whether or not 3D video is included for each scene of a program in a sequence (a set of data composed of a plurality of pictures) or header information allocated for each picture.

Not only these examples but also the operation mode is determined so that it can be discriminated at the time of reception, the recording / reproducing apparatus (the program information processing unit 304 and the control unit 316 according to the present embodiment) discriminates accordingly. The effect is obtained.
As described above, there are many methods for realizing the display of 3D video. In this embodiment, any of the 3D video display methods may be used. Note that the synchronization control unit 318 and the output terminal 319 shown in FIG. 3 are not necessary when a method other than the frame sequential method is used. FIG. 4 is an example of data input to the recording / reproducing apparatus 4. In FIG. 4A, the image data for the left and right eyes are present as independent streams, and an input stream is obtained by mixing them. In this example, for the sake of simplicity, the images for the right eye and the left eye are alternately arranged in units of pictures. However, even if the images are nested in units of TS packets or in units of one or more pictures, The subsequent concept is the same.

  For example, when a user views a stream of this format, the decoding processing unit 304 sequentially decodes each picture in the input order shown in the right part of FIG. Display video alternately with parallax. Based on the synchronization signal transmitted by the synchronization control unit 318, the shutter glasses allow the right-eye lens to be transmitted when the right-eye image is displayed, and the image can be visually recognized. When the left-eye image is displayed, the left-eye lens is transmitted. Make the video visible. In this figure, 2D display is illustrated as being performed with an image for the left eye.

  When recording is performed, the data conversion processing unit 308 updates and inserts (Remux) program information to generate a recording stream while maintaining the order of the video streams as shown in the lower left part. In other words, if the content recorded on the recording medium 312 is sequentially read out in the recording order at the time of playback, the decoding processing unit 305 receives and processes the video data in the same order as when receiving the broadcast.

  In addition, processing for adding time information (time stamp) to the reception timing for each TS packet is performed. Thereby, at the time of reproduction, the same data transmission as at the time of broadcast reception becomes possible by adjusting the output timing with reference to the time stamp added from the data conversion processing unit 308.

  The encryption / decryption processing unit 309 performs encryption as necessary during recording, and decrypts data that has been encrypted during reproduction. The recording / reproducing unit 310 performs writing / reading on the recording medium 312 by a predetermined method.

  For example, video data is converted from MPEG2 format to H.264 format. Since there is a merit that the data capacity can be compressed by using the H.264 format, there are cases where recording is performed by changing the format of video data or audio data, or recording at a reduced data rate without changing the format. . At this time, the data conversion processing unit 308 individually performs rate conversion or format conversion for the right-eye stream and the left-eye stream, and then reconstructs (Remux) one stream to generate a recording stream. At this time, it is necessary to remux without changing the positional relationship between the right-eye video and the left-eye video.

  As another example of the input stream format, FIG. 4B shows a format in which each image data and accompanying depth information are added. In this case as well, the input data is sequentially processed until the decoding process. The display control unit 306 generates a right-eye image and a left-eye image based on the depth information, and displays them alternately to realize stereoscopic video display.

  The control when using shutter glasses is the same as in the previous example. Also in this case, at the time of recording, a recording stream is generated in the same order as the input order as shown in the lower left part. When the data conversion processing unit 308 converts the data rate or changes the angle of view at the time of recording, it is necessary to appropriately convert the depth information accordingly.

  As another example of the input stream format, FIG. 4C is a schematic diagram in which a TS stream configured by alternately combining left-eye video and right-eye video is input. In this example, for the sake of simplicity, the images for the right eye and the left eye are alternately arranged in units of pictures. However, the images may be nested in units of TS packets or in units of one or more pictures. .

  The method for realizing the stereoscopic image display alternately displays the same as the previous example. The control of the shutter glasses is the same as in the previous example. Also in this case, at the time of recording, a recording stream is generated in the same order as the input order as in the description of FIGS. 4 (a) and 4 (b). In the case of this data string, since the I picture is included only in the video for the left eye, 2D display is always performed with the video for the left eye.

  In any example, the arrangement of pictures such as the number of B pictures is not limited to the example shown in the figure. For example, even when the number of B pictures between P pictures is 4 or 6 in each of the right-eye and left-eye streams in FIG. 4A, the control and effects in the above-described embodiment and the embodiments described later are the same.

  Next, an operation sequence when the user instructs a fast-forward operation by an instruction means such as a remote controller from a recording medium will be described.

  An example of video output control when fast-forwarding will be described with reference to FIG. Fast forward is realized by continuously displaying images at discontinuous playback positions. This is the same processing when sending in the forward direction of the stream and when turning back in the forward direction. By adjusting the time interval of images to be displayed and the display time of one image, the fast-forward double speed is determined.

  For example, FIG. 5A shows an example of fast-forwarding for the data in which the images shown in FIG. 4A are arranged. When fast-forwarding is performed in 2D display, for example, only I-picture data for the left eye is continuously displayed. Further, the control of the shutter glasses is stopped, and the user views 2D video with both eyes.

On the other hand, when displaying in 3D, it is necessary to use not only the left-eye stream I picture but also the corresponding right-eye I-picture video for display, and to adjust the shutter opening / closing timing in synchronization with each display timing. is there.
For example, the left-eye I picture and the right-eye I picture corresponding to the left-eye I-picture are input to the decoding processing unit 305 for decoding, and then the left-eye I-picture corresponding to the left-eye I-picture is decoded again. Thus, by performing local decoding and display, a fast-forwarding operation is realized by reducing the number of displayed images while maintaining 3D display.

  FIG. 5B shows an example of fast-forwarding for the data string shown in FIG. When 2D display is performed, I picture data is acquired and decoded and displayed. Further, the control of the shutter glasses is stopped, and the user views 2D video with both eyes. When 3D display is performed, depth information corresponding to the 3D display is acquired together, I-pictures for both eyes are generated and displayed, and the shutter opening / closing timing is also controlled.

  FIG. 5C shows an example of fast-forwarding with respect to the data in which the images shown in FIG. 4C are arranged. At this time, when fast-forwarding is performed in 2D display, only I picture data is continuously displayed. On the other hand, when displaying in 3D, in addition to the I picture, the video of the P picture for the right eye corresponding thereto is also used for display.

  In the above description, the example of fast-forwarding in the forward direction has been described. However, the principle is the same for so-called fast-rewinding and turning-back processing that proceeds in the reverse time direction.

  In addition, as a fast-forwarding method, for example, there is a so-called “fast-playing” method in which sound is output at 1.3 times speed or 1.5 times speed. When performing this processing on 3D video, the basic control is to display more frames by decoding data other than the I picture. In the case where display cannot be performed, for example, only I picture and some or all P pictures are decoded / displayed, or some B pictures are thinned out (the system time information is operated to decode / display some B pictures). Display to control the display to be skipped). Alternatively, there is also a method of performing control by thinning out picture decoding / display processing adaptively according to the processing capability of the control unit.

  Similarly, FIG. 5B shows an example of fast-forwarding with respect to data having the image arrangement shown in FIG. For example, a left-eye I picture and a corresponding right-eye picture are generated and displayed by the display unit 306, and a right-eye picture corresponding to the next left-eye I picture is decoded. By performing decoding and display, a fast-forwarding operation is realized by reducing the number of displayed images while maintaining 3D display. You may change the space | interval of the image to process.

  Further, when fast-forwarding at a high speed, it is possible to realize an arbitrary speed by controlling the selection of the I picture to be decoded and displayed and the display time of one picture according to the double speed number.

  Another way to achieve fast-forwarding is to play the video at a 1x speed for a certain amount of time and skip to a certain time ahead or to the previous data. This can also be realized by repeating the control.

  Hereinafter, an example of control when performing the above-described fast-forward operation for a program capable of 3D display will be described. Although the description will be given by taking the fast-forwarding operation as an example, processing related to fast-rewinding (rewinding) may be considered similarly.

  As a switching method related to 3D display, when fast-forwarding is performed, 2D display is always performed, and when returning to 1 × speed playback, the display may be returned to 3D. Alternatively, 3D display may be performed in a fast-forward operation at a low speed (for example, a speed lower than 3 × speed), and 2D display may be performed in a fast-forward operation at a high speed (for example, 3 × speed or more). Alternatively, when the user sets whether to perform 3D display at the time of fast-forwarding and displays according to the setting, or according to the content of the program, it is configured to control so that only the portion of 3D display is shown at the time of fast-forwarding Also good.

  FIG. 6 shows a processing sequence for switching between 2D display and 3D display when the process is switched from 1 × speed display to fast forward playback. In step (hereinafter abbreviated as S) 601, an instruction to switch to fast-forward playback is transmitted to the control unit 316 by a remote control operation from the user or operation of the operation unit 315 during the 1 × speed playback operation, and the process proceeds to S602.

  In S602, the control unit 316 determines whether the recording / reproducing apparatus 4 is displaying (outputting) 3D video. For example, the display control unit 306 may determine whether the input video is being displayed as a 3D video. When it is determined that 3D video is being displayed, the process proceeds to S603, and when it is determined that 3D video is not being displayed, the process proceeds to S604.

  In step S603, the control unit 316 switches the display control unit 306 to perform 2D display. For example, input data to the decoding processing unit 305 is only left-eye or right-eye video. Alternatively, both the left and right videos are decoded, but the display control unit 306 outputs only one of the left-eye video and the right-eye video, or an intermediate from the left-eye I-picture video and the corresponding right-eye I-picture video. There is a method of generating and displaying the video. If the 2D content video is converted to 3D video and output, the process of converting to 3D video may be stopped.

  The control unit 316 controls the synchronization control unit 318 to stop transmission of the synchronization signal. For example, in the case of the frame sequential method, both the left and right lenses transmit light synchronously, and the user can visually recognize a 2D image displayed on the display unit with both eyes. The above control is performed and it progresses to S604.

  In S604, the control unit 316 performs a predetermined fast-forward operation. For example, only the picture data portion necessary for fast-forward display is read from the recording medium, and the video is displayed through predetermined processing by the recording / playback unit 310, the encryption / decryption processing unit 309, and the like.

  In S602, the display control unit 306 determines whether or not 3D video is being displayed. However, the display control unit 306 determines whether or not the playback program is 3D content or whether the scene being played back is 3D video. Also good. Whether the scene currently being played back corresponds to 3D video is included in program information periodically included in the stream such as PMT and SIT, in sequence header information, or in header information of each picture Information indicating whether or not the scene can be displayed in 3D may be referred to.

  This sequence is the same when switching between 2D display and 3D display when changing the playback speed of fast-forward playback, for example. There are several reasons why the user performs special playback such as fast-forwarding. One is to view the story at high speed while understanding the outline of the story, or to search for a desired playback position because another scene is desired to be viewed from the video at the current viewing time.

  In the former example, it is considered that it is desirable to perform fast-forward while keeping the display in 3D so that the user does not lose a sense of reality. On the other hand, in the latter example, the display may be switched to 2D until a desired position is found.

  That is, for example, a low-speed fast feed such as 2 × speed or 3 × speed is performed in 3D display, and for example, switching to 2D is performed when switching to a relatively fast fast-forward playback such as 10 × speed next.

  If the control unit 316 determines the condition for proceeding to S602, the subsequent processing can be similarly implemented. The order of the condition determination for switching and the condition determination for determining whether or not the playback program or scene is in 3D display may be arbitrary.

  FIG. 7 shows a processing sequence for switching between 3D display and 2D display when switching from fast forward playback to 1 × speed playback. In S701, during a playback operation in which fast-forwarding is performed in 2D display, an instruction to switch to single-speed playback is transmitted to the control unit 316 by a remote control operation from the user or an operation of the operation unit 315, and the process proceeds to S702.

  In the processing in S702, it is determined whether or not 3D video has been displayed before fast-forward playback. If it is determined that the 2D video is being displayed, the process proceeds to S703. If it is determined that the 3D video is being displayed, the process proceeds to S704.

  In step S <b> 703, the control unit 316 switches the display control unit 306 to display 3D, and controls the synchronization control unit 318 to start transmission of a synchronization signal. For example, in the case of the frame sequential method, only one of the left and right lenses transmits light based on the received synchronization signal, and a video with parallax displayed on the display unit can be viewed as 3D. The above control is performed and it progresses to S704.

  In step S704, the control unit 316 starts single-speed reproduction by a predetermined operation. At this time, the presence or absence of audio output may be switched.

  In S702, the display control unit 306 determines whether or not the 3D video has been displayed. However, whether or not the playback program is 3D content or whether or not the scene where the 1 × speed playback is resumed is 3D video. It may be determined by Whether or not a scene for restarting 1 × speed playback is compatible with 3D video is included in program information periodically included in the stream such as PMT and SIT, in sequence header information, or in header information of each picture. Information indicating whether or not the included scene can be displayed in 3D may be referred to.

  When a scene that can display 3D video and a scene that cannot be displayed are mixed in one recorded program (for example, the main program can display 3D video, but the commercial message (CM) part is When the data cannot be displayed, or when the program producer intentionally mixes the display of 2D video, etc.), automatically when the receiving device 4 detects the stream to switch the display between 3D video and 2D video. To do.

  For example, when there is information indicating whether or not a scene can be displayed in 3D in the PMT or in the sequence header, or when switching is detected during recording, for example, if the switching point information is stored together with the recording data, Also, 3D / 2D display can be switched based on the detected information.

  Alternatively, the control unit may analyze the feature of the decoded frame image and detect a pattern unique to the 3D image, or the like, and the program name includes the letters 3D. You may determine combining each process.

  The sequence in this case will be described with reference to FIG. In step S801, the control unit 316 detects switching point information from the program information processing unit 304 or the separation unit 302, and the process advances to step S802. In step S802, the control unit 316 acquires information such as whether the current display state is 3D or whether the user has selected a mode for performing 3D display, and determines whether the display needs to be switched at this switching point. To do.

  For example, it is determined that it is necessary when the setting for performing 3D display is valid and the state of the 3D display is being performed at this time and the stream state is switched from 3D to 2D at this switching point. Or when the setting which performs 3D display is invalid, since it is always displaying in 2D, it determines with there being no need to switch.

  If it is necessary to switch, the process proceeds to S803, and if not, the process ends. In S803, if the current display is 3D, the display is switched to 2D display, and if it is 2D display, the display is switched to 3D display and the process is terminated. The switching procedure is the same as that in the embodiments S603 and S703.

  When ON / OFF of 3D display is switched by a user operation during playback, the display is switched using this. FIG. 9 shows an example of the menu display, and FIG. 10 shows an example of the switching sequence. For example, a function menu 901 as shown in FIG. 9 is displayed by a specific remote control operation by the user. Further, by selecting a 3D setting item from these items, the user can select whether the 3D display is valid or invalid.

  In step S1001, the control unit 316 recognizes that the user has changed the 3D setting item, and the process advances to step S1002. In S1002, the control unit 316 determines whether or not the currently displayed program can be displayed in 3D. If the program can be displayed, the process proceeds to S803.

  In S803, 2D display and 3D display are switched as described above, and the process ends. This embodiment can be executed in the same way even during playback at 1 × speed or during special playback. Further, as in the switching of 3D display ON / OFF shown in the present embodiment, there may be an item for setting, for example, 3D display ON / OFF during fast forward. That is, when turned on, the display method during special playback is set to 3D, and when turned off, the display method during special playback is set to 2D display.

  Also, special playback when a 2D display portion and a 3D display portion are mixed, particularly fast-forwarding at a high speed (for example, a speed higher than 3 times speed), makes the viewing user uncomfortable when the 2D display and the 3D display change rapidly. May feel. Therefore, for example, during execution of 3D display, control may be performed so that only the 3D display portion is decoded and displayed. For example, if the data read from the recording medium is determined to be a 2D display portion, the image may not be decoded / displayed. In the meantime, for example, the display of the still image of the last displayed video may be maintained.

  The previous data is continuously read, and when it is determined that the read data is a 3D display portion, decoding / display is resumed. As described above, it is possible to display only the 3D display portion.

  Whether the 2D display part or the 3D display part is read, for example, if the read data includes program information such as a sequence header, a GOP header, or a PMT, and a flag for determining whether or not 3D display is possible is included in them. Thereby, it can be determined by the control unit 316.

  Or you may discriminate | determine by analyzing the characteristic of the image | video after decoding. Contrary to the above example, when 3D display is not executed, all read data may be decoded and displayed in 2D. Alternatively, the user may set whether to display only the 3D portion in advance, and may control whether to skip the 2D display portion accordingly.

  In addition, the method of detecting the switching point of 3D display availability in the above embodiment is an example, and is not limited to the present embodiment. For example, the trigger for stopping / starting may be switching of the audio format in conjunction with switching of display, or may be chapter information uniquely set in the recording / reproducing apparatus 4.

  The above description has been made taking broadcast reception from the transmission device 1 as an example. However, for example, a case where a stream from the distribution server 6 via the network is received is considered. At this time, the input program information data may include information in a stream (also referred to as metadata) independent of the video / audio data.

  FIG. 11 shows the configuration of the recording / reproducing apparatus 4 in this case. Reference numeral 1101 denotes an input / output terminal for transmitting and receiving data via a network. A network transmission / reception unit 1102 manages network data transmission / reception. The network transmitting / receiving unit 1102 may include a function of encryption / decryption processing necessary for transmitting data on a network such as DTCP-IP.

  When stream data including video / audio data and metadata are received separately, for example, the separation unit 303 extracts the metadata and transfers the data to the program information processing unit 304, and the program information processing unit 304 acquires the program information. Thus, an embodiment similar to that at the time of broadcast reception can be applied.

  In the case of stream reception via a network, the metadata includes information that can be used to determine whether the received content can be displayed in 3D, and information that indicates a portion that can be displayed when 3D display is partially possible. Also good. In this case, the control unit 308 can implement an embodiment in which the 2D / 3D display described above is switched based on such information.

  Further, consider an input from another recording / reproducing apparatus 6 connected to the recording / reproducing apparatus 4. The configuration of the recording / reproducing apparatus 4 in this case is shown in FIG. A command 1201 processes a command for cooperation between devices, and performs data transfer to the display control unit 306 to display stream data including received video / audio data. An input / output terminal 1202 is connected to another recording / reproducing device.

  In addition to receiving stream data from another recording / reproducing device 6, control commands such as switching of energization control, channel change, and change of reproduction speed during special reproduction are transmitted and received between the two devices. At this time, the recording / reproducing apparatus 4 performs video / audio display by appropriately displaying the received data at the display control unit 306. In this case as well, switching between 3D and 2D display during special playback can be performed in the same manner as in the above-described embodiment.

  In FIG. 12, the functional blocks added in FIG. 11 are included, but these may be omitted.

  According to the above embodiment, user convenience can be improved by switching between 3D display and 2D display during special playback. In addition, it is possible to improve user convenience by switching and displaying 3D / 2D video display according to the purpose of each special playback.

  In the above embodiment, the processing by the playback device having the recording function has been described, but it is not always necessary to have the recording function. Any apparatus that reproduces content recorded on a recording medium can perform the processing described in this embodiment.

  DESCRIPTION OF SYMBOLS 4 ... Recording / reproducing apparatus 301 ... Input terminal 302 ... Broadcast receiving part 303 ... Separation part 304 ... Program information processing part 305 ... Decoding processing part 306 ... Display control part 307 ... Output terminal 308 ... Data conversion processing part 309 ... Encryption / decoding processing part DESCRIPTION OF SYMBOLS 310 ... Recording / reproducing part 311 ... Input / output terminal 312 ... Recording medium 313 ... Remote control interface 314 ... Remote control light-receiving part 315 ... Operation part 316 ... Control part 317 ... Memory 318 ... Synchronization control part 319 ... Output terminal 320 ... System bus 1101 ... On Output terminal 1102 ... Network transmission / reception unit 1201 ... Data transmission / reception unit 1202 ... Input / output terminal

Claims (8)

A playback device capable of playing back 3D video,
Decoding means for decoding a 3D video stream composed of a left-eye video stream and a right-eye video stream to generate a left-eye image and a right-eye image;
An output means for alternately reading out the left-eye image and the right-eye image decoded by the decoding means and outputting an image;
Instruction means for performing processing corresponding to the user's operation;
A control unit that controls the decoding unit and the output unit according to an instruction from the instruction unit;
When the instruction means gives an instruction to change the playback speed, the control unit controls the decoding means to decode only one of the left-eye video stream and the right-eye video stream, or the output A reproduction apparatus characterized by performing processing for controlling the means to output only one of a left-eye image and a right-eye image. In the playback device according to claim 1,
A recording medium;
A reproduction control unit for transferring data from the recording medium to the decoding means,
The decoding means is capable of decoding a 3D video stream recorded on a recording medium,
The reproduction apparatus according to claim 1, wherein the control unit performs a process of switching the reproduction control unit to intermittently read data from the recording medium in response to an instruction to change the reproduction speed by the instruction unit.   3. The recording / reproducing apparatus according to claim 2, wherein the data output by the output means is left-eye image data. In the reproducing | regenerating apparatus of Claim 1 or 2,
When an instruction to change the playback speed is given by the instruction means and then an instruction to reproduce at a single speed is given, the control unit controls the decoding means to decode the video stream for the left eye and the video stream for the right eye. And a playback apparatus that controls the output means to output a left-eye image and a right-eye image. A playback device capable of playing back 3D video,
Decoding means for decoding a 3D video stream composed of a left-eye video stream and a right-eye video stream to generate a left-eye enlargement and a right-eye image;
Output means for alternately outputting the left-eye image and the right-eye image decoded by the decoding means;
A controller for controlling the decoding means and the output means,
When a part of the video stream is a 3D video stream and has 3D video position information indicating the position of the 3D video stream in the video stream, the control unit performs the decoding processing unit according to the 3D video position information. , Control to switch between the process of decoding one of the left-eye video stream and the right-eye video stream and the process of decoding the left-eye video stream and the right-eye video stream, or the output unit for the left-eye A playback apparatus that performs control to switch between processing for outputting one of an image and a right-eye image and processing for outputting a left-eye image and a right-eye image. The playback apparatus according to claim 5, wherein
When playback is performed at a speed higher than 1 × speed, the control unit controls the decoding unit to decode a 3D video stream of the video stream, or the output unit controls a 3D video stream of the video stream. Is controlled to output a decoded image. A playback device for playing back video data recorded on a recording medium,
A playback unit for playing back video data from a recording medium;
An output unit for outputting video data reproduced by the reproduction unit;
An interface for receiving instructions from the user,
The playback unit can play back video data as 3D video,
When the playback unit receives the instruction to change the playback speed through the interface while the video data recorded on the recording medium is being played back as 3D video, the video data recorded on the recording medium is played back as 2D video. A playback apparatus characterized in that the playback is switched to playback. A playback method for playing back video data recorded on a recording medium,
Reproducing video data from a recording medium;
Outputting the reproduced video data; and
Receiving instructions from the user,
A playback method characterized by switching playback of video data to playback as 2D video when receiving an instruction to change the playback speed while playing back video data recorded on a recording medium as 3D video.

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