JP2006237745A - Optical disk, information reproducing apparatus, and information reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information recording medium such as an optical disk capable of considerably reducing a storage capacity of a memory provided to an information reproducing apparatus for storing data included in graphic data recorded on the information recording medium such as an optical disk. <P>SOLUTION: Graphic data of the optical disk for recording the graphic data included in an image for a user to select prescribed information and being data associated with a button changed in a plurality of states in response to a user's operation includes image data corresponding to an image of the button and color data corresponding to a color given to the button and denoting a state of the button. Then the color data are provided correspondingly to each state of the button. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical disc, an information reproducing apparatus, and an information reproducing method.

  A conventional information recording medium such as an optical disc can record a graphic unit that can be output and displayed superimposed on a main image. The graphic unit has highlight information, mask data that highlights the button shape of a selected button, and It includes graphic data representing all button shapes, and highlight information includes color palette information, button information, adjacent button information, and button commands (for example, Patent Document 1).

JP 2004-343254 A

  However, in the conventional information recording medium, graphic data necessary for the construction of the selection menu is provided for each of normal use, selection use and confirmation use. Therefore, for example, when the graphic data provided for each of the normal use, the selection use and the confirmation use is data having a large amount of data such as image data, the storage capacity of the memory for storing the graphic data Need to be larger. As a result, the circuit scale of a reproducing apparatus or the like that reproduces the recording medium increases.

  Therefore, the present invention has been made to solve the above-described problems, and is an information recording such as an optical disc that can greatly reduce the storage capacity of a memory for storing data included in graphic data. The purpose is to provide a medium.

  An optical disc according to the present invention is an optical disc on which graphic data, which is data relating to a button that is included in an image for a user to select predetermined information and changes to a plurality of states in accordance with a user operation, The graphic data includes image data corresponding to an image of the button and color data assigned to the button and corresponding to a color indicating a state of the button, and the color data includes the button It is provided corresponding to each state.

  According to the optical disk of the present invention, it is possible to greatly reduce the storage capacity of a memory that is provided in an information reproducing apparatus that reproduces data recorded on the optical disk and stores data included in graphic data.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of information reproducing apparatus 100 in the first embodiment. In FIG. 1, 1 is an optical disk on which predetermined data (for example, control data necessary for controlling the information reproducing apparatus 100, video and audio data, etc.) is recorded, and 2 is a drive for reading data recorded on the optical disk 1. Reference numeral 3 denotes a data processing unit for processing the read data. 4 is a demultiplexer that separates data read by the drive 2 into video data, audio data, and graphic data, 5 is an audio decoder that demodulates (hereinafter also referred to as decoding) audio data, and 6 is video data. A video decoder unit for decoding, 7 a graphic decoder unit for decoding graphic data, and 8 a video superimposing unit for superimposing a video obtained by decoding the video data and an image obtained by decoding the graphic data.

  In FIG. 1, the drive 2 reads the data recorded on the optical disc 1 and outputs it to the demultiplexer 4. The data output from the drive 2 includes the video data corresponding to video (hereinafter also referred to as video) recorded on the optical disc 1, the audio data that is audio information corresponding to the video data, and the The graphic data, which is data of an image (hereinafter referred to as graphic) superimposed on video corresponding to video data, is packetized and multiplexed data.

  The demultiplexer 4 separates input data into video data, audio data, and graphic data. Then, the audio data is output to the audio decoder unit 5, the video data is output to the video decoder unit 6, and the graphic data is output to the graphic decoder unit 7. The demultiplexer 4 performs the separation according to the identifier described at the head of each packetized data.

  The audio decoder unit 5 decodes the input audio data and outputs it to an audio output means (not shown). The video decoding unit 6 decodes the input video data and outputs the decoded video data to the video superimposing unit 8. In addition, the graphic decoder unit 7 decodes the input graphic data and outputs it to the video superimposing unit 8.

  The video superimposing unit 8 superimposes the video obtained by decoding the video data in the video decoding unit 6 and the graphic obtained by decoding the graphic data in the graphic decoder unit 7 and outputs them to display means (not shown).

  FIG. 2 is a block diagram showing the configuration of the graphic decoder unit 7. 9 is a graphic decoder for decoding compressed picture data, 10 is a graphic buffer for storing decoded picture data, 11 is a palette buffer for storing color palette data, and 12 is data for controlling graphic display. Is a control data buffer for storing graphic control data, 13 is a graphic parser for separating graphic data output from the demultiplexer 4 into picture data, color palette data, and graphic control information, and 14 is control data in the control data buffer. The graphic controller 14 controls the display of the graphic according to FIG. The picture data is picture data constituting a graphic. The color palette data is data for determining a color to be attached to the picture.

  In FIG. 2, the graphic parser 13 separates the graphic data input from the demultiplexer 4 into picture data, graphic control data, and color palette data. The picture data is output to the picture decoder 9, the graphic control data is output to the control buffer data 12, and the color palette data is output to the palette buffer 11.

  Here, the graphic data will be described. FIG. 3 is an explanatory diagram for explaining the configuration of graphic data. In FIG. 3, 15 is graphic control data for controlling graphic display, 16 is color palette data to be graphic color information, and 17 is compressed picture data. As shown in FIG. 3, the graphic data is data composed of graphic control data 15, color palette data 16 and picture data 17. Details of each data constituting the graphic data will be described later.

  The picture decoder 9 decodes the input picture data 17 and outputs it to the graphic buffer 10. The graphic buffer 10 stores a picture obtained by decoding the picture data 17 in the picture decoder 9. The picture is an image constituting the graphic. For example, when the graphic is a moving image, one image constituting the moving image is a picture.

  The control data buffer 12 is configured by storage means such as a semiconductor memory, and stores the input graphic control data 15. The graphic control data 15 stored in the control data buffer 12 is read out by a graphic controller, which will be described later, and used as control data when the graphic is displayed on a display unit (hereinafter also referred to as a screen) of the display means. Is done.

  The palette buffer 11 is configured by storage means such as a semiconductor memory, and stores input color palette data 16. Note that the color palette data 16 stored in the palette buffer 12 is read out by the graphic controller and used as color information for determining colors to be attached to the graphic. More specifically, the color palette data 16 stored in the palette buffer 12 is interpreted by the graphic controller 14. Then, the graphic controller 14 develops information on each color included in the interpreted color palette data 16 in the palette buffer 12. As a result, the color palette is stored in the palette buffer 12.

  The graphic controller 14 reads the graphic control data 15 stored in the control data buffer 12. Next, a picture stored in the graphic buffer 10 is acquired based on the graphic control data 15, and a color corresponding to the picture is acquired from the palette buffer 11 to generate a predetermined graphic. Then, the generated graphic is output to the video superimposing unit 8.

  Then, as described above, the video superimposing unit 8 superimposes the output of the video decoder 6 and the graphic and outputs them to the display means. As a result, on the display unit of the display means, an image (hereinafter also referred to as a composite image) in which the video corresponding to the video data and the graphics are combined is displayed.

  FIG. 4 is an explanatory diagram for explaining an example of a composite image. As shown in FIG. 4, the video 18 obtained in the video decoder unit 6 and the graphics (button 1 191, button 2 192 and button 3 193) obtained in the graphic decoder unit 7 are superimposed on the screen. The displayed image is displayed.

  Note that button 1 191, button 2 192 and button 3 193 illustrated in FIG. 4 are buttons for selecting predetermined data recorded on the optical disc 1. For example, when a plurality of videos are recorded on the optical disc and the video is selected by the buttons 191 to 193, buttons 191 to 193 are provided in association with the respective videos. That is, the button 191 selects the first video from the plurality of videos, the button 2 192 selects the second video, and the button 3 193 selects the third video. ~ 193 are provided.

  FIG. 5 is an explanatory diagram for explaining a state of a button which is a graphic in the first embodiment. As shown in FIG. 5, the button is provided with a plurality of states in order to make it easier for the user to select a video. For example, in the case shown in FIG. 5, a non-selected state 20 in which the button is simply displayed, and a cursor (not shown) displayed for selecting the button on the screen is positioned on the button. Three states are provided: a selection state 21 indicating that the button is selected, and a determination state 22 indicating that the button in the selection state has been determined (that is, the user has selected a video corresponding to the button).

  Here, the contents of the picture data 17, color palette data 16 and graphic control data 15 constituting the graphic data will be described.

  FIG. 6 is an explanatory diagram for explaining the conventional syntax of the picture data 17. Note that the syntax of the picture data 17 shown in FIG. 6 is the one before being decoded by the graphic decoder 9. In FIG. 6, “num_of_picture” indicates the total number of pictures included in the picture data 17. As described above, in the first embodiment, one image constituting a graphic is a picture.

  The process described in the line below “num_of_picture” (that is, the line below “for”) is repeated by the number of “num_of_picture”. “Picture_id” is an ID (identification) number specific to each picture included in the picture data 17, and each picture is identified by this ID number. “Picture_hight” indicates the size of the picture in the vertical direction (Y direction in FIG. 4). “Picture_width” indicates the size of the picture in the horizontal direction (X direction in FIG. 4). The vertical size is the maximum height of the picture, and the horizontal size is the maximum width of the picture. Therefore, in Embodiment 1, one picture is treated as a rectangle defined by “picture_width” and “picture_hight”. FIG. 7 is an explanatory diagram for explaining “picture_width” and “picture_hight”. In FIG. 7, h indicates “picture_hight” and w indicates “picture_width”.

  “Picture_size” indicates the data size of “picture_data ()” described from the next line of the “picture_size”. “Picture_data ()” is compressed compressed picture data. The graphic decoder 9 decodes all the pictures included in the picture data 17 by repeating the processing of the rows below “for” by the number of “num_of_picture”. Then, the decoded picture (actually, the decoded data in “picture_data ()”) is sequentially stored in the graphic buffer 10.

  Next, FIG. 8 is an explanatory diagram for explaining the conventional syntax of the color palette data 16. The syntax of the color palette data 16 shown in FIG. 8 is the syntax of the color palette data 16 after being separated by the graphic parser 13. In FIG. 8, “num_of_color” indicates the total number of colors included in one color palette. The processing described in the line below “num_of_color” (that is, the line below “for”) is repeated by the number of “num_of_color”. “Color_id” is an ID number unique to each color included in the palette. “Red_data”, “green_data”, and “blue_data” are data corresponding to each color of R (Red), G (Green), and B (Blue) for designating a color specified by “color_id”. “Trans_data” is data indicating a ratio (transmittance) at which an image corresponding to the video data is transmitted through the graphic.

  FIG. 9 is a schematic diagram schematically showing a color palette defined by the syntax of the color palette data 16. In FIG. 9, each data included in the color palette is shown as 8-bit (1 byte) data. As shown in FIG. 9, in the color palette, the ID numbers (1 to n) are assigned to the colors included in the color palette. Then, R, G, and B color data are stored in association with each ID number. Therefore, for example, data of R = 5, G = 5, B = 5, and T = 0 is stored for the color having “color_id” of “1” in FIG.

  FIG. 10 is an explanatory diagram for explaining a graphic corresponding to a picture obtained as a result of decoding in the graphic decoder 9. In FIG. 10, a case where the graphic is composed of 16 pixels of 4 (pixels) × 4 (pixels) will be described in order to simplify the description. Each square in FIG. 10 represents one pixel. In FIG. 10A, the number given to each pixel is “color_id” corresponding to the color of the pixel.

  As shown in FIG. 10A, in the graphic, all pixels in the first row of the uppermost row (hereinafter, all the pixels in the first row in the graphic are collectively referred to as first pixels). “color_id” is “1”. In addition, all pixels in the second row (hereinafter, all pixels in the second row in the graphic are collectively referred to as second pixels) have “color_id” of “50”, and all pixels in the third row “Color_id” in the graphic (hereinafter, all the pixels in the third row in the graphic are collectively referred to as a third pixel) is “100”. Further, “color_id” of all the pixels in the fourth row (hereinafter, all the pixels in the fourth row in the graphic are collectively referred to as a fourth pixel) is “150”. For example, if “color_id” in each pixel shown in FIG. 10A is “color_id” of the color palette shown in FIG. 9, each color indicated by an arrow outside the color palette shown in FIG. Attached to the pixel. Then, the graphic becomes a rectangle having a different color for each line as shown in FIG.

  As described above, a graphic is generated based on the picture data 17 and the color palette data 16. The graphic is generated by the graphic controller 14 based on the graphic control data 15 stored in the control data buffer 12. . Hereinafter, the generation of the graphic will be described.

  FIG. 11 is an explanatory diagram for explaining the conventional syntax of the graphic control data 15. The graphic control data 15 includes control information necessary for realizing the display as shown in FIG. 4 (for example, position information regarding the position of the graphic on the screen).

  In FIG. 11, “start_PTS” indicates a time at which graphic display is started. “End_PTS” indicates a time at which the display of the graphic is ended. The graphic controller 14 uses these PTSs to synchronize with the video obtained in the video decoder unit 6. Further, the time for displaying the graphic is determined by “start_PTS” and “end_PTS”. When the graphic is compressed by MPEG (Moving Picture Expert Group) 2, the PTS corresponds to “Presentation Time”.

  “Num_of_button” indicates the total number of buttons displayed on the screen. Therefore, for example, in the composite image shown in FIG. 4, since three buttons (buttons 1 to 3) are displayed, the value of “num_of_button” is 3. The processing described in the line below “num_of_button” (that is, the line below “for”) is repeated by the number of “num_of_button”. That is, in the case shown in FIG. 4, the process is performed three times.

  “Button_id” indicates an ID number assigned to each button. “X_position” and “y_position” indicate the position of the upper left corner of each button on the display unit. Note that “x_position” and “y_position” are set so that an arbitrary point on the screen is the origin and the relative position from the origin is indicated.

  “Left_button_id”, “right_button_id”, “up_button_id”, and “down_button_id” are the next to one button when the user presses a selection key provided on an operation means (not shown) when the button is in a selected state. Describes “button_id” of the button to be selected. The selection means is a remote controller attached to the information reproducing apparatus 100. The selection key is a key for moving a cursor displayed for selecting the button on the screen up, down, left, or right.

  For example, in the case of the composite image shown in FIG. 4, “button_id” of the button 1 191 is set to “1”, “button_id” of the button 2 192 is set to “2”, and “button_id” of the button 3 193 is set to “3”. Suppose that It is assumed that button 2 (“button_id” = 2) is selected in the composite image. Furthermore, it is assumed that “left_button_id” = 1 and “right_button_id” = 3 are set. In this case, when the user operates the cursor to move the cursor to the left by the selection key, the cursor moves to the button 1. When the user operates the selection key to move the cursor to the right, the cursor moves to the button 3.

  “Duration_time” indicates the number of frames between pictures constituting the animation when the graphic is displayed as an animation. More specifically, the picture constituting the graphic and the frame constituting the video are displayed in synchronization. For example, when a graphic is displayed as an animation, if the picture is displayed in synchronization with each frame that is continuously played back, the animation operation becomes faster. On the other hand, when the picture is displayed in synchronization every predetermined number of frames, the animation operation becomes slow. Therefore, “duration_time” is set to an arbitrary value according to the graphic display mode.

  In “normal_state”, “select_state”, and “active_state”, information for displaying a graphic corresponding to each of the non-selected state, the selected state, and the determined state is described. As described with reference to FIG. 5, there are three states of the graphic: a non-selected state, a selected state, and a determined normal state, and the graphic changes according to each state. Therefore, a picture of each state is prepared for one graphic. Specifically, in the case shown in FIG. 4, a non-selected picture, a selected picture, and a decided picture are provided for each of the three buttons (button 1 to button 3).

  “Animation_flag” is a flag indicating whether or not to animate the graphic. That is, when “animation_flag” is “1”, the graphic is displayed as an animation. In this case, “first_picture_id” indicates “picture_id” of a picture to be displayed first (that is, the first picture) when an animation display is displayed. Further, “end_picture_id” indicates “picture_id” of the picture to be displayed last in the animation display. For example, when “first_picture_id” = 5 and “end_picture_id” = 10, six pictures from “picture_id” = 5 to “picture_id” = 10 are displayed in succession. The graphic is displayed as an animation.

  On the other hand, when “animation_flag” is “0”, the graphic is displayed as a still image. At this time, the same “picture_id” is described in “first_picture_id” and “end_picture_id”. “Animation_flag”, “first_picture_id”, and “end_picture_id” described above are described in “normal_state”, “select_state”, and “active_state”, respectively. Therefore, for example, a non-selected state can be displayed as a still image, and other states can be displayed as a moving image. Note that “command” described only in “active_state” describes a command for executing the next operation after the button is in the determined state.

  Based on the graphic control data 15 described above, the graphic controller 14 selects and obtains a picture to be displayed from the graphic buffer 10 and obtains the color obtained from the color palette of the palette buffer 11 for each pixel in the graphic. To generate a graphic.

  Here, the storage capacity of the graphic buffer 10 when the conventional picture data 17, color palette data 16, and graphic control data 15 are used in the information reproducing apparatus 100 will be described.

  FIG. 12 is an explanatory diagram for explaining the storage capacity of the graphic buffer 10. FIG. 12 shows a state in which buttons 1 to 3 having a size of 400 pixels × 200 pixels are displayed as graphics. The button is displayed as an animation in the non-selected state and the selected state, and is displayed as a still image in the determined state. Each button is displayed in a different color between the non-selected state and the selected state. Then, 30 pictures are used when displaying the animation. Further, the still image displayed in the determination state is one image provided separately from the 30 pictures.

  In the above case, if the amount of data necessary for displaying one pixel is 1 byte, the amount of data necessary for displaying one picture is 80 KB (kilobytes) (400 (pixels) × 200 (pixels) = 80000 (× is a multiplication symbol, the same shall apply hereinafter)). Each state display requires 90 pictures in the non-selected state (30 pictures for each of the buttons 1 to 3), 90 pictures in the selected state, and 3 pictures in the determined state. That is, in order to display three buttons (buttons 1 to 3), a total of 183 pictures are required. Then, the data size of the picture necessary for displaying the graphic of FIG. 12 is 80 (KB) × 183 (sheets) ≈14.6 MB (megabytes). Therefore, when the above-described conventional picture data 17, color palette data 16 and graphic control data 15 are used, the storage capacity of the graphic buffer 10 must be 14.6 MB or more.

  However, in general, when a button as described in FIG. 12 is displayed, the color of each button changes in accordance with the change in state (non-selected state, selected state, and determined normal state). There is little change to a completely different pattern. That is, even if a picture is not provided for each state, the graphic shown in FIG. 12 can be displayed by preparing a color palette for each state. Therefore, in the first embodiment, the color palette data 16 and the graphic control data 15 recorded on the optical disc 1 have a syntax as described below, and the information reproducing apparatus 100 uses a graphic based on the syntax. Display.

  FIG. 13 is an explanatory diagram for explaining the syntax of the color palette data 16 in the first embodiment. In the following description, the syntax description described in FIG. 8 is the same description, and the description is omitted. “Num_of_palet” described in the second line in the syntax of FIG. 13 describes the total number of color palettes included in the color palette data 16. Therefore, for example, in the case of the graphic shown in FIG. 12, since one color palette is provided for each state, “number_of_palet” is “3”. “Palet_id” described in the fourth line is an ID number unique to each palette used to identify each palette. Then, the processes from “palet_id” to “trans_data” are repeated as many times as described in “number_of_palet”.

  FIG. 14 is an explanatory diagram for explaining the syntax of the graphic control data 15 in the first embodiment. In the following description, the description of the syntax described in FIG. 11 is the same, and the description is omitted. In the syntax of FIG. 14, “button_palet_id” described in the first line of each state (noromal_state, select_state, active_state) is an ID number of a color palette provided for each state (ie, “palet_id” in FIG. 13). Is described. As shown in FIG. 14, by describing the syntax of the graphic control data 15, an independent color palette can be defined for each state.

  FIG. 15 is an explanatory diagram for explaining a graphic displayed when the syntaxes of the color palette data 16 and the graphic control data 15 are described as in the first embodiment. In the description of FIG. 15, for the sake of simplicity, a button composed of 16 pixels of 4 (pixels) × 4 (pixels) is displayed as a still image (that is, “animation_flag” is “0”). The case where it will be described.

  As shown in FIG. 15, in the first embodiment, the pictures used in the non-selected state and the selected state are the same picture (in the case of FIG. 14, “picture_id” of the picture is “1”). Then, the color palette in the non-selected state and the color palette in the selected state are different color palettes.

  For example, as shown in FIG. 15, it is assumed that the color of each pixel in the picture is set as follows. That is, the color of the first pixel is defined as “color_id” = 1, and the color of the second pixel is defined as “color_id” = 50. Further, it is assumed that the color of the third pixel is defined by “color_id” = 100 and the color of the fourth pixel is defined by “color_id” = 150. Furthermore, it is assumed that “palet_id” of the color palette set for the non-selected state is “1” and “palet_id” of the color palette set for the selected state is “2”. Then, as shown in FIG. 15, the color defined by “color_id” = 1, 50, 100, 150 in the color palette “palet_id” is “1” and the “pallet_id” in the color palette “2”. The color defined by “color_id” = 1, 50, 100, 150 is a different color. For example, in FIG. 15, the color defined by “color_id” = 1 in the color palette whose “palet_id” is “1” is R = 5, G = 5, B = 5, and T = 0. The colors defined by “color_id” = 1 in the color palette with “palet_id” being “2” are R = 10, G = 10, B = 10, and T = 0.

  Then, when the graphic control data of FIG. 15 is used, the color palette used in each state is different although the same picture is used in the non-selected state and the selected state. The graphic color in each state can be displayed in a different color.

The display as described above can also be performed when the graphic is displayed as an animation (that is, “animation_flag” is “1”). That is, even in the case of displaying a graphic animation, similarly, by setting a color palette having a different “palet_id” for each state, it is possible to display a graphic of a different color even if the same picture is used. That is, even when “first_picture_id” and “end_picture_id” corresponding to each state (noromal_state, select_state, active_state) are set to the same “picture_id”, the respective states can be displayed in different colors.

  Then, when the buttons 1 to 3 are animated as shown in FIG. 12 using 30 pictures, 31 buttons are used for each button (30 pictures used in the non-selected state and selected state + used state in the determined state). One picture) may be provided. That is, when three buttons are displayed, a total of 93 pictures may be provided.

  Then, when the graphic display as shown in FIG. 12 is performed, if the color palette data 16 and the graphic control data 15 in the first embodiment are used, the storage capacity of the picture buffer 10 necessary for the graphic display is 80 (KB). ) × 93 (sheets) ≈7.4 MB. That is, it is possible to reduce the storage capacity by about half compared to the case where a picture is provided for each button state and the same color palette is used for all buttons.

  On the other hand, in the case of the first embodiment, it is necessary to increase the storage capacity of the palette buffer 11 in order to provide a plurality of color palettes. However, as described in FIG. 9, when the colors included in the color pallet are 256 colors, the data size per one color pallet is 1 KB (R, G, B, and T are 1B because each of them is 1B). Since the color is 4B and 256 colors, 256 × 4≈1000). Therefore, even if the color palette is increased by 1, the amount of increase in the storage capacity of the palette buffer 11 is 1 KB. That is, the increase in the storage capacity of the palette buffer 11 with the increase in the number of color palettes is very small compared to the decrease in the storage capacity of the picture buffer 10. As a result, the storage capacity of the entire graphic decoder unit 7 can be greatly reduced. Therefore, the circuit scale of the information reproducing apparatus 100 as a whole can be greatly reduced.

  As described above, according to the optical disk 1 in the first embodiment, even when the graphic state changes, the information reproducing apparatus 100 can display the graphic using the same picture. As described above, conventionally, a picture is provided for each state of the graphic. That is, even when the color changes only in each state of the graphic and the pattern does not change, it is necessary to store a plurality of the same pictures in the picture buffer 10. However, in the case of Embodiment 1, it is not necessary to store a plurality of identical pictures in the picture buffer 10.

  Therefore, the size of the memory for storing the picture can be greatly reduced as compared with the conventional case of displaying graphics. Therefore, the circuit scale of the information reproducing apparatus 100 can be made smaller, and the information reproducing apparatus 100 can be manufactured at a low cost.

  Conversely, when the storage capacity is the same as that of the picture buffer 10 in the conventional information reproducing apparatus, it is possible to display more convenient graphics for the user by using more pictures.

  Hereinafter, decoding of the picture data 17 and processing for the color palette data 16 in the graphic controller 14 will be described. The processing of the graphic controller 14 based on the graphic control data 15 will be described.

  FIG. 16 is a flowchart for explaining the decoding procedure of the picture data 17. The picture decoder 9 decodes the picture data 17 as follows. First, the total number of pictures included in the picture data 17 is detected (S61). Next, the picture data included in the picture data 17 is decoded. (S62). Further, the picture obtained as a result of decoding is stored in the picture buffer 10 (S63). Then, it is determined whether or not the processes of S62 and S63 described above have been performed for the number of pictures detected in S61 (S64). As a result of the determination, when the processes of S62 and S63 are not performed the number of times of the number of pictures detected in S61 (S64: No), the process returns to S62 and is repeated. On the other hand, when the processes of S62 and S63 are performed as many times as the number of pictures detected in S61 (S64: Yes), the process ends.

  FIG. 17 is a flowchart for explaining processing for the color palette data 16 in the graphic controller 14. The graphic controller 14 interprets the color palette data 16 as follows. First, the graphic controller 14 detects the total number of color palettes included in the color palette data 16 (S81). Next, the ID number of the color palette included in the color palette data is detected (S82), and the total number of colors included in the color palette corresponding to the ID number is detected (S83). Then, R, G, B, T data of each color included in the color palette is detected (S84), and the detected data is stored in the palette buffer 11 (S85). Then, it is determined whether or not the processes of S84 and S85 have been performed as many times as the number of colors detected in S83 (S86). As a result of the determination, if the processes of S84 and S85 are not performed the number of times of the number of colors detected in S83 (S86: No), the process returns to S84 and is repeated. On the other hand, when the processes of S84 and S85 are performed as many times as the number of pictures detected in S83 (S64: Yes), the determination of S87 is performed. That is, it is determined whether or not the processing of S82 to S86 has been performed the number of times of the number of color palettes detected in S81 (S87). As a result of the determination, when the processes of S82 to S86 are not performed the number of times of the number of color palettes detected in S81 (S87: No), the process returns to S82 and is repeated. On the other hand, when the processes of S82 to S86 have been performed the number of times of the number of color palettes detected in S81 (S87: Yes), the process ends. Then, the graphic controller 14 stores the color palette obtained as a result of processing by the above procedure in the palette buffer 11.

  FIG. 18 is a flowchart for explaining the processing of the graphic decoder based on the graphic control data 15. The graphic controller 14 generates a graphic based on the graphic control data 15 as follows. First, the graphic controller 14 detects start_PTS ”,“ end_TS ”, and the number of buttons (S111), and then detects the ID number of one button (S112), and then corresponds to the detected ID number“ x_position ”,“ y_position ”,“ left_button_id ”,“ right_button_id ”,“ up_button_id ”,“ down_button_id ”, and“ duration_time ”are detected (S113 to S116), and“ button_palet_id ”,“ animation_flag ”, “First_picture_id” and “end_picture_id” are detected (S117 to S119), and it is determined whether or not the processing from S112 to S119 has been performed for the total number of buttons detected in S111 (S120). , When the processes of S112 to S119 are not performed the total number of buttons detected in S111 (S 20: No More), the process returns to S112 On the other hand, if you make the number of the total number of the button detection processing at the S111 of S112~S119 (S120:. Yes) in the process is terminated.

Embodiment 2. FIG.
In the first embodiment, the storage capacity of the graphic buffer 10 is reduced by defining a color palette for each state of the graphic. In the second embodiment, a case will be described in which the capacity of the graphic buffer 10 is reduced without using a plurality of color palettes.

  In the first embodiment, two 256 color palettes are used simultaneously. In general, as the color used in the video signal processing unit 3 increases, the circuit scale of the video signal processing unit 3 increases. Therefore, in the second embodiment, the graphic control data 15 is described as described below.

  FIG. 19 is an explanatory diagram for explaining the syntax of the graphic control data 15 according to the second embodiment. In the following description, the syntax description described in the first embodiment is the same description, and the description is omitted.

  In the syntax of FIG. 19, “color_id_offset” described in the first line of each state (noromal_state, select_state, active_state) describes an offset value from the ID number of each color in the set color palette. Therefore, each pixel constituting the picture is assigned a color whose ID number (color_id) is a value obtained by adding the offset value to the ID number (color_id) in the color palette. Hereinafter, the “color_id_offset” will be specifically described.

  FIG. 20 is an explanatory diagram for explaining “color_id_offset”. In the following description, for the sake of simplicity, a button composed of 16 pixels of 4 (pixels) × 4 (pixels) is displayed as a still image (that is, “animation_flag” is “0”). A case where

  In the graphic of FIG. 20, the pictures used in the non-selected state and the selected state are the same picture (in the case of FIG. 20, “picture_id” of the picture is “1”). Then, “color_id_offset” in the non-selected state and “color_id_offset” in the selected state are set to different values.

  For example, as shown in FIG. 20, it is assumed that the color of each pixel in the picture is set as follows. That is, the color of the first pixel is defined as “color_id” = 1, and the color of the second pixel is defined as “color_id” = 2. Further, it is assumed that the color of the third pixel is defined by “color_id” = 3 and the color of the fourth pixel is defined by “color_id” = 4. Furthermore, it is assumed that “color_id_offset” set for the non-selected state is “0” and “color_id_offset” set for the selected state is “100”.

  Then, in the case of FIG. 20, the same picture is used in the non-selected state and the selected state, but since the “color_id_offset” set for each state is different, the color of the graphic in each state Can be displayed in different colors.

  That is, in FIG. 20, “color_id” of the first pixel in the non-selected graphic is “1”, and “color_id_offset” is “0”. Therefore, “color_id” of the first pixel is 1+ “color_id_offset” = 1. Therefore, the first pixel is assigned a color having “color_id” of “1” in the color palette (a color of R = 5, G = 5, B = 5, T = 0).

  Similarly, the second pixel in the non-selected graphic has a color (“R_35”, “G = 35”, “B = 35”, and “T = 0”) having “color_id” of “2” in the color palette. Is done. In addition, the third pixel in the non-selected graphic is assigned a color having “color_id” of “3” in the color palette (R = 55, G = 55, B = 55, T = 0). The The fourth pixel in the non-selected graphic is assigned a color (color = R = 77, G = 77, B = 77, T = 0) having “color_id” of “4” in the color palette. The

  On the other hand, in FIG. 16, “color_id” of the first pixel in the selected graphic is “1”, and “color_id_offset” is “100”. Therefore, the substantial “color_id” of the first pixel is 1+ “color_id_offset” = 101. Accordingly, the first pixel is assigned a color having “color_id” of “101” in the color palette (R = 10, G = 10, B = 10, T = 0).

  Similarly, a color (“R = 20, G = 20, B = 20, T = 0”) whose color_id is “102” in the color palette is assigned to the second pixel in the selected graphic. . In addition, the third pixel in the selected graphic is assigned a color with “color_id” of “103” in the color palette (R = 40, G = 40, B = 40, T = 0). . The fourth pixel in the graphic in the selected state is assigned a color (“R = 55, G = 55, B = 55, T = 0”) whose color_id is “104” in the color palette. .

The display as described above can also be performed when the graphic is displayed as an animation (that is, “animation_flag” is “1”). That is, in the case where a graphic is displayed as an animation, the same picture and the same color palette can be used by setting different “color_id_offset” for each state. Specifically, “first_picture_id” in all states (“noromal_state”, “select_state”, “active_state”) can be set to the same “picture_id”. Also, “end_picture_id” can be the same “picture_id”. In addition, different colors can be displayed using the same color palette.

  As described above, according to the optical disc 1 in Embodiment 2, the storage capacity of the picture buffer 10 can be greatly reduced without increasing the storage capacity of the palette buffer 11 in the information reproducing apparatus 100. . Therefore, the circuit scale of the information reproducing apparatus 100 can be made smaller. In addition, the information reproducing apparatus 100 can be manufactured at a low cost.

  The processing of the graphic controller 14 based on the graphic control data 15 in the second embodiment will be described below.

  FIG. 21 is a flowchart for explaining the processing of the graphic decoder based on the graphic control data 15 in the second embodiment. The graphic controller 14 generates a graphic based on the graphic control data 15 as follows. First, the graphic controller 14 detects start_PTS, “end_TS”, and the total number of buttons (S191), and detects the ID number of one button (S192). x_position ”,“ y_position ”,“ left_button_id ”,“ right_button_id ”,“ up_button_id ”,“ down_button_id ”, and“ duration_time ”are detected (S193 to S196), and“ color_id_offset ”,“ animation_flag ”corresponding to each state, “First_picture_id” and “end_picture_id” are detected (S197 to S199), and it is determined whether or not the processing from S192 to S199 has been performed for the total number of buttons detected in S191 (S200). When the processes of S192 to S199 are not performed the total number of buttons detected in S191 ( 200: the No), the process returns to S192 On the other hand, if you make the number of the total number of buttons detected in the process of S191 of S192~S199 (S200:. Yes) in the process is terminated.

  In the above description, the case where the color palette is set to 256 colors (1 byte) has been described, but the number of colors set in the color palette may be smaller or larger than 256 colors.

  Further, in the description of FIG. 20, when “color_id” of the color used in the non-selected state and “color_id” of the color used in the selected state are continuous (“color_id” = 1 to 4 and “color_id” = 101). ˜104) has been described, but the “color_id” of the color used in each state does not have to be continuous and can be arbitrarily set. For example, in the case of FIG. 20, the “color_id” of the first pixel is “1”, the second “color_id” is “10”, the third “color_id” is “12”, and the “color_id” of the fourth pixel "Can be set as" 3 ". In FIG. 20, a case has been described in which “color_id” set for each pixel in each row is the same, but “color_id” of each pixel in each row can be arbitrarily set.

  In the description of FIG. 20, the case where “color_id_offset” is set to “100” has been described, but the value of “color_id_offset” can be arbitrarily set. Also, different “color_id_offset” may be set for each state (“noromal_state”, “select_state”, “active_state”). For example, “color_id_offset” of “noromal_state” can be set to “1”, “color_id_offset” of “select_state” can be set to “80”, and “color_id_offset” of “active_state” can be set to “160”.

  As described above, when different “color_id_offset” is set for each state, the number of colors that can be used in one state is reduced. This will be specifically described below. For example, when a 256-color palette is divided into three areas approximately equally (hereinafter, the area on the divided color palette is also referred to as a divided area), the area “color_id” = 1 to 85 is the first divided area. , “Color_id” = 86 to 170 is the second divided area, and “color_id” = 171 to 256 is the third divided area. If the first area is assigned to the non-selected state, the second divided area is selected, and the third area is assigned to the determined state, the number of colors that can be used in each state is approximately 85 colors.

  Therefore, in the above case, more colors can be used in each state as follows. That is, when a color equal to or greater than the predetermined “color_id” is set in a picture obtained by decoding picture data, the value of “color_id_offset” is not added to “color_id” in the picture. Then, the color of the predetermined “color_id” or more becomes a color that can be used in all states (hereinafter also referred to as a common color). For example, when a color of “color_id” = 181 or more is a common color, the common color is 75 colors. A color having “color_id” of “color_id” = 180 or less is divided into three as described above and assigned to each state. Then, 60 colors can be used only in each state. However, since the common color can be used in all states, 60 + 75 = 135 colors can be used in each state. The predetermined “color_id” may be handled separately from the other predetermined “color_id” with a name such as “common_color_id”, for example.

  In the above description, the case where “color_id_offset” is set for each state has been described. However, when “color_id_offset” is “0”, “color_id_offset” may not be provided. That is, “color_id_offset” does not necessarily have to be provided for all states, and “color_id_offset” may be provided for any two states or only one state.

  For example, when “color_id_offset” in “noromal_state” is “0”, “color_id_offset” in “select_state” is “100”, and “color_id_offset” in “active_state” is “200”, “select_state” and “active_state” “Color_id_offset” may be provided for “”, and “color_id_offset” may not be provided for “normal_state”.

In the above description, the case where the optical disc 1 is used as an example of the information recording medium has been described. However, the information recording medium may be optical or magnetic.

It is a block diagram which shows the structure of the information reproduction apparatus 100 in Embodiment 1 of this invention. It is a block diagram which shows the structure of a graphic decoder part. It is explanatory drawing for demonstrating the structure of graphic data. It is explanatory drawing for demonstrating an example of a synthesized image. 6 is an explanatory diagram for explaining a state of a button which is a graphic according to Embodiment 1. FIG. It is explanatory drawing for demonstrating the conventional syntax of picture data. It is explanatory drawing for demonstrating "picture_width" and "picture_hight". It is explanatory drawing for demonstrating the conventional syntax of color palette data. It is the schematic diagram which showed typically the color palette prescribed | regulated by the syntax of color palette data. It is explanatory drawing for demonstrating the graphic corresponding to the picture obtained as a result of the decoding in a graphic decoder. It is explanatory drawing for demonstrating the conventional syntax of graphic control data. It is explanatory drawing for demonstrating the memory capacity of a graphic buffer. 6 is an explanatory diagram for describing syntax of color palette data according to Embodiment 1. FIG. 6 is an explanatory diagram for explaining the syntax of graphic control data according to Embodiment 1. FIG. FIG. 6 is an explanatory diagram for explaining a graphic displayed when syntaxes of color palette data and graphic control data are described as in the first embodiment. It is a flowchart for demonstrating the decoding procedure of picture data. 4 is a flowchart for explaining processing for color palette data 16 in the graphic controller 14; 4 is a flowchart for explaining processing of a graphic decoder based on graphic control data in the first embodiment. 4 is a flowchart for explaining processing of a graphic decoder based on graphic control data 15; FIG. 10 is an explanatory diagram for explaining “color_id_offset”. 10 is a flowchart for explaining processing of a graphic decoder based on graphic control data 15 in the second embodiment.

Explanation of symbols

  1 optical disk, 2 drive, 3 video signal processing unit, 4 demultiplexer, 5 audio decoder unit, 6 video decoder unit, 7 graphic decoder unit, 8 video superimposing unit, 9 graphic decoder, 10 graphic buffer, 11 palette buffer, 12 control Data buffer, 13 graphic parser, 14 graphic controller.

Claims (3)

An optical disc on which graphic data, which is data relating to a button that changes into a plurality of states in accordance with a user operation,
The graphic data is
Image data corresponding to the image of the button,
And a color attached to the button, the color data corresponding to a color indicating the state of the button,
The optical disk, wherein the color data is provided corresponding to each state of the button. An information reproducing apparatus for reproducing the optical disk according to claim 1,
A drive for reading data recorded on the optical disc;
First decoding means for decoding image data included in graphic data of data read by the drive;
Second decoding means for decoding video data of the data read by the drive;
An information reproducing apparatus comprising: means for superimposing the output of the first decoding means and the output of the second decoding means. An information reproducing method for reproducing the optical disc according to claim 1,
Read data recorded on the optical disc,
Decode the image data included in the graphic data of the data read from the optical disc,
Decode video data of the data read from the optical disc,
An information reproduction method including superimposing the decoded image data and the image data.

Images