JP2008152478A - Data reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide data reproducing device for properly reproducing animation data, including a plurality of encoded static image data. <P>SOLUTION: When shift is made to an inactivated state, an animation object 30 erases a frame number in the last plotting timing, and erases decoded data stored in a Pixel Buffer 17, and when shift is made to an activated state again, the animation object 30 initializes a parameter used for calculating the frame number with the last plotting timing. Thus, even if MNG element data are reproduced again, after being reproduced once, the data will be not plotted from the static image data, corresponding to the next frame number of the frame number of the finally plotted static image data in the case of the previous reproduction but will be plotted from the static image data, corresponding to the first frame number. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a data reproducing apparatus for reproducing animation data including a plurality of encoded still image data.

As a data reproduction device in the above technical field, based on the animation effect table, position information, selection object information, and enlargement / reduction value information of the selection object are set for all target objects to be reproduced at a specific reproduction time. On the basis of this, there is known a technique in which reproduced image data of all target objects are synthesized for each specific reproduction time and displayed on a display unit (for example, see Patent Document 1).
JP 2006-107132 A

  By the way, when reproducing animation data including a plurality of still image data, for example, if the animation data is reproduced once and then reproduced again, the frame next to the frame number of the still image data drawn at the end of the previous reproduction is displayed. There is a possibility that animation data may not be reproduced properly, such as drawing from still image data corresponding to a number.

  Therefore, the present invention has been made in view of such circumstances, and an object of the present invention is to provide a data reproducing apparatus capable of appropriately reproducing animation data including a plurality of encoded still image data. To do.

  In order to achieve the above object, a data reproduction apparatus according to the present invention is a data reproduction apparatus for reproducing animation data including a plurality of encoded still image data, and an animation related to reproduction processing for animation data. Setting means for setting an object, instruction means for selectively instructing an animation object to transition to an activated state that is a playback state and a transition to an inactive state that is a non-playback state, and the animation object is activated Storage means for storing decoded data of still image data at a predetermined drawing timing when the image data is in a converted state, and the animation object is based on a predetermined parameter based on a frame number of the still image data at the predetermined drawing timing. Calculating means and the calculated frame number And a management means for managing a predetermined parameter in at least one of transition to an activated state and transition to an inactivated state and transition to an activated state and a deactivated state The frame number is deleted in at least one of the transitions to.

  According to the present invention, animation data including a plurality of encoded still image data can be appropriately reproduced.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the data reproducing apparatus 1 is an HD DVD (High Definition Digital Versatile Disc) player provided with a Data Access Manager 2, a Data Cache 3, a Navigation Manager 4, a Presentation Engine 5, and an AV Renderer 6.

  The Data Access Manager 2 is a module that performs operations such as reading and writing of a file by accessing a disk, a network, or the like according to an instruction from the File Cache 3 or the like. The Data Access Manager 2 has a persistent storage manager 7, a network manager 8, and a disk manager 9.

  The Persistent Storage Manager 7 is a module that performs operations such as reading / writing and deleting files in the Persistent Storage in accordance with instructions from the host.

  The Network Manager 8 is a module that downloads a file from the Network Server or uploads a file according to an instruction from the upper module.

  The Disk Manager 9 is a module that reads a file on an HD DVD disc in accordance with an instruction from the host.

  Data Cache 3 is a 64 MByte buffer that temporarily stores read files and the like. The Data Cache 3 includes a File Cache that operates as a cache when the Navigation Manager 4 and the Presentation Engine 5 read a file, and a Streaming Buffer that is used for buffering when the Secondary Video Player 21 performs streaming playback of video data on the Network Server. Yes.

  The Navigation Manager 4 is a module that performs overall control of advanced contents, reproduction processing of contents described in markup and ECMA scripts, operation corresponding to input from a remote controller, and the like. The Navigation Manager 4 has a File Cache Manager 11, a Playlist Manager 12, a Parser 13, an Advanced Application Manager 14, and a User Interface Engine 15.

  When receiving an instruction from the Playlist Manager 12 or the Advanced Application Manager 14, the File Cache Manager 11 is a module that controls the Data Access Manager 2 and the Primary Video Player 22 to read and manage a target file from the disk or network to the Data Cache 3.

  The Playlist Manager 12 is a module that reads content configuration information and the like from the Playlist at the start of playback of advanced content, and controls initialization of each module and Title Timeline.

  The Advanced Application Manager 14 is a module that performs overall control of advanced content playback operations. The Advanced Application Manager 14 has a Declarative Engine and a Programming Engine. The Declarative Engine is a module that performs timing control and graphic display and character display by control of the Presentation Engine 5 according to the markup description. The Programming Engine is a module that interprets and executes a script described in an ECMA script. From an ECMA script, an API defined by the HD DVD standard is called to enable player control, graphic drawing, file operation, and the like. The Programming Engine controls the Presentation Engine 5 to realize graphic drawing and player control instructed from the script via the API.

  The User Interface Engine 15 is a module that controls the cursor and transmits an input from the remote controller to the Advanced Application Manager 14 as an event.

  The Presentation Engine 5 is a module that appropriately decodes data such as graphics, video, and audio, creates final graphic images, video frame images, and the like, and sends them to the AV Renderer 6. The Presentation Engine 5 includes an Advanced Application Presentation Engine 16, a Pixel Buffer 17, a Font Rendering System 18, an Advanced Subtitle Player 19, a Secondary Video Player 21, a Primary Video Player 22, and a Decoder Engine 23.

  The Advanced Application Presentation Engine 16 has a Sound Decoder 24, a Graphics Decoder 25, and a Layout Manager 26, as shown in FIG. The Advanced Application Presentation Engine 16 reads elements such as images such as PNG (Portable Network Graphics), MNG (Multiple-image Network Graphics), and JPEG (Joint Photographic Experts Group) from the Data Cache 3 and decodes them in accordance with instructions from the Navigation Manager 4. This is a module that creates a final output image on the graphic plane and outputs it to the AV Renderer 6, or outputs the WAV file read from the Data Cache 3 to the AV Renderer 6 as LPCM data.

  The Graphics Decoder 25 performs a process of decoding an image such as PNG, MNG, JPEG, or registering / deleting the decoded image in the Pixel Buffer 17.

  The Layout Manager 26 draws the decoded image registered in the Pixel Buffer 17 according to the layout information coming from the Advanced Application Manager 14 and draws it, or issues a font drawing instruction to the Font Rendering System 18 to display it on the graphic plane. Build the final display image. Then, the completed display image is sent to the AV Renderer 6.

  As shown in FIG. 1, the Advanced Subtitle Player 19 generates an output image on the sub-picture plane according to the markup description in the Advanced Subtitle in the same manner as the Layout Manager 26, and sends it to the AV Renderer 6.

  The Primary Video Player 22 and the Secondary Video Player 21 are modules that perform playback control as a Video Player. The Primary Video Player 22 and the Secondary Video Player 21 analyze the TMAP at the time of playback, read out necessary locations from the Data Access Manager 2, classify them into video video data, audio data, sub-picture data, etc., and send them to each decoder in the Decoder Engine 23. Output.

  The Decoder Engine 23 decodes the received video data and audio data encoded by MPEG2, etc., and outputs the decoded data to the AV Renderer 6 as final image data or PCM data.

  Next, playback processing of MNG element data (animation data) in the data playback device 1 will be described.

  MNG is a format that expresses a moving image by collecting a plurality of PNGs that are encoded still image data and adding necessary information to the moving image as a continuous change of a still image (frame). The MNG has information such as a frame progression speed (frame rate) and can understand how fast the built-in still image group should proceed. Similar to PNG, the MNG format stores various information in units of data blocks called chunks.

  The reproduction-instructed MNG element data is read into the Data Cache 3. The Graphics Decoder (setting means) 25 acquires MNG element data from the Data Cache 3, and gives one animation object function to one MNG element data. That is, the Graphics Decoder 25 sets an animation object related to the reproduction process for the MNG element data.

  As shown in FIG. 3, the animation object 30 includes a time acquisition unit 31 that acquires the current time from the time information generation unit 27 of the data reproduction device 1, and a frame management unit that manages frames stored in the MNG element data (Management means) 32 and a display frame determination unit (calculation means) 33 for determining a frame number to be drawn at each drawing timing.

  The Advanced Application Presentation Engine (instruction means) 16 issues a reproduction command to appropriate MNG element data based on the time information. In the case of MNG element data, receiving a playback command indicates that the MNG element data is self-propelled in an area designated as an independent object without depending on other states. This reproduction state is the activation state of the animation object 30.

  In addition, when the MNG element data is not played back during the activation state of the animation object 30, the Advanced Application Presentation Engine 16 issues a playback stop command to the MNG element data. This non-reproduction state is set as the inactivation state of the animation object 30.

  In this manner, the Advanced Application Presentation Engine 16 selectively instructs the animation object 30 to transition to the activated state that is the playback state and to transition to the inactivated state that is the non-playback state. Note that once the animation object 30 receives a reproduction command, it continues to draw still image data at each drawing timing until it receives a reproduction stop command.

  FIG. 4 is a flowchart showing the procedure of the reproduction process of the MNG element data in the data reproduction apparatus 1.

  When the animation object 30 transitions to the activated state according to an instruction from the Advanced Application Presentation Engine 16, the time acquisition unit 31 acquires the time at each drawing timing from the time information generation unit 27 for each drawing timing (step S41). Then, it is determined whether or not the time at the current drawing timing is the first drawing timing (step S42).

  As a result, when the time at the current drawing timing is not the first drawing timing, the display frame determination unit 33 calculates the difference between the time at the current drawing timing and the time at the previous drawing timing, and calculates the difference and the frame. Based on the rate, the frame number of the still image data at the current drawing timing is calculated by calculating the number of frames advanced from the frame number of the still image data at the previous drawing timing (step S43).

  On the other hand, when the time at the current drawing timing is the first drawing timing, there is no time information at the previous drawing timing, so the display frame determination unit 33 replaces the time at the previous drawing timing with the Advanced Application. The time when the Presentation Engine 16 instructs the animation object 30 to transition to the activated state is used to calculate the frame number of the still image data at the current drawing timing (step S44).

  When the frame number to be drawn is calculated, the frame management unit 32 manages the calculated frame number. Further, the animation object 30 refers to the Pixel Buffer (storage means) 17 and checks whether or not the decoded data of the still image data corresponding to the calculated frame number is stored (step S45).

  As a result, when the decoded data is stored in the Pixel Buffer 17, the animation object 30 determines not to decode the still image data corresponding to the calculated frame number, and the decoded data from the Pixel Buffer 17 is determined. And the decoded data is rendered (step S46).

  On the other hand, when the decoded data is not stored in the Pixel Buffer 17, the animation object 30 determines to decode the still image data corresponding to the calculated frame number, and the MNG element data and the frame number are decoded. Send to 28. Then, the animation object 30 causes the decoding unit 28 to decode the still image data corresponding to the frame number to generate decoded data (step S47), store the decoded data in the Pixel Buffer 17, and The decoded data is acquired from the Pixel Buffer 17, and the decoded data is drawn (step S48).

  The processing of steps S47 and S48 is performed when the frame number of still image data at the current drawing timing is calculated by using the time when the Advanced Application Presentation Engine 16 instructs the animation object 30 to transition to the activated state ( It is also executed in step S44).

  Note that when the generated decoded data is stored in the Pixel Buffer 17, the decoded data stored so far is deleted. Thus, the Pixel Buffer 17 stores the decoded data of still image data at a predetermined drawing timing when the animation object 30 is in an activated state.

  The decrypted data acquired from the Pixel Buffer 17 is sent to the AV Renderer 6 via the Layout Manager 26 and displayed on the screen as shown in FIG.

  FIG. 5 is a diagram showing a list of operation timings of MNG element data that can be read from the markup. For example, the MNG element data CCC.mng indicates that it entered Chapter 8 and started self-running after 0 seconds and continued to run for 90 seconds.

  FIG. 6 is a state transition diagram of the animation object of the MNG element data in this case. Thus, the animation object 30 has the possibility of transitioning between the activated state and the deactivated state many times. This is because the timing at which the animation object 30 becomes valid is designated by markup, and is activated at the designated timing. For example, in the case of MNG element data associated with a video chapter number, the chapter number is easily moved by a user operation. That is, it is not possible to know in advance the timing of transition to the activated state and the timing of transition to the inactivated state.

  By the way, it is desirable that the animation object 30 does not perform the object release process at the time of transition to the inactivated state due to a processing load problem. Therefore, if the object release processing is not performed, the animation object 30 of the MNG element data that transitions to the activated state again after transitioning to the deactivated state has the last parameter in the previous activated state. Will be. Therefore, when drawing is started in a state where the animation object 30 is reused, the drawing is restarted based on the last drawing timing information that was in the previous activated state. That is, the image is drawn from the still image data corresponding to the frame number next to the frame number of the still image data drawn at the end of the previous reproduction. This increases the risk of displaying the frame against the intention of the content producer.

  Therefore, in the data reproducing apparatus 1, when the animation object 30 transitions to the inactive state, the animation object 30 deletes the frame number at the last drawing timing and deletes the decoded data stored in the Pixel Buffer 17, When transitioning to the activated state again, the parameters used to calculate the frame number at the last drawing timing are initialized. Thus, even if the MNG element data is reproduced once and then reproduced again, it is not drawn from the still image data corresponding to the frame number next to the frame number of the still image data drawn at the end of the previous reproduction. The image is drawn from the still image data corresponding to the first frame number.

  As described above, the animation object 30 of the MNG element data once created is retained without being discarded even if the MNG element data is hidden, so that the processing time can be shortened. . When the stored animation object 30 is reused, it can behave as if the animation object 30 was re-created without dragging the previous display parameter, and an operation satisfying the HD DVD standard can be performed. .

  The present invention is not limited to the embodiment described above.

  For example, the animation object 30 initializes the parameter used to calculate the frame number at the time of transition to the activated state and at least one of the transition to the inactivated state, and transits to the activated state. The calculated frame number may be deleted in at least one of the transitions to the inactivated state. Further, as a parameter for calculating the frame number, the number of repetitions of reproduction of MNG element data in one activated state, reproduction operation information of MNG element data in one activated state, or the like may be used.

It is a block diagram which shows the internal structure of one Embodiment of the data reproduction apparatus which concerns on this invention. FIG. 2 is a block diagram showing an internal configuration of the Advanced Application Presentation Engine shown in FIG. 1. FIG. 3 is a block diagram showing an internal configuration of a Graphics Decoder shown in FIG. 2. It is a flowchart which shows the procedure of the reproduction | regeneration processing of MNG element data in a data reproduction apparatus. It is a figure which shows the list | wrist of the operation | movement timing of MNG element data which can be read from markup. It is a state transition diagram of the animation object of MNG element data.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Data reproduction apparatus, 16 ... Advanced Application Presentation Engine (instruction means), 17 ... Pixel Buffer (storage means), 25 ... Graphics Decoder (setting means), 30 ... Animation object, 32 ... Frame management part (management means), 33: Display frame determination unit (calculation means).

Claims (5)

A data reproduction device for reproducing animation data including a plurality of encoded still image data,
Setting means for setting an animation object related to the reproduction process for the animation data;
Instruction means for selectively instructing the animation object to transition to an activated state that is a reproduction state and to a deactivation state that is a non-reproduction state;
Storage means for storing decoded data of the still image data at a predetermined drawing timing when the animation object is in the activated state;
The animation object includes a calculation unit that calculates a frame number of the still image data at the predetermined drawing timing based on a predetermined parameter, and a management unit that manages the calculated frame number. In at least one of the transition to the activated state and the transition to the inactivated state, the predetermined parameter is initialized, and at least one of the transition to the activated state and the transition to the deactivated state A data reproducing apparatus, wherein the frame number is deleted.   The data according to claim 1, wherein the animation object deletes the frame number when transitioning to the inactive state, and initializes the predetermined parameter when transitioning to the active state. Playback device. The calculation means calculates the still image data at the predetermined drawing timing based on a time at the predetermined drawing timing, a time at the previous drawing timing, a frame number of the still image data at the previous drawing timing, and a frame rate. Frame number of
When the decoded data of the still image data corresponding to the calculated frame number is stored in the storage unit, the animation object stores the still image data corresponding to the calculated frame number. When it is determined not to be decoded and the decoded data of the still image data corresponding to the calculated frame number is not stored in the storage unit, the still image corresponding to the calculated frame number 3. The data reproducing apparatus according to claim 2, wherein it is determined that the data is to be decrypted, and the decrypted data stored in the storage means is deleted when transitioning to the inactive state.   The predetermined parameters are: the time when the instruction means instructs the animation object to transition to the activated state, the number of repeated reproductions of the animation data in the activated state, and the activated state. 4. The data reproduction apparatus according to claim 1, comprising at least one of reproduction operation information of the animation data.   The instruction means selects a transition to an activated state and a transition to the inactivated state of the animation data based on at least one of a chapter related to a video to be played in synchronization with the animation data and a time 5. The data reproducing apparatus according to claim 1, wherein the data reproducing apparatus is instructed automatically.

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