JP4255917B2 - Karaoke device characterized by display burn-in prevention control - Google Patents

Description

  The present invention relates to a technique for preventing burn-in of a display that occurs due to display of a fixed still image of a program between songs in a karaoke apparatus.

  In general, in displays such as personal computers, it is known that when a pattern with high brightness and high contrast is repeatedly displayed at the same position over a long period of time, a phenomenon that a trace remains due to deterioration of the phosphor, so-called burn-in. .

  On the display of the karaoke device, lyrics and background video are displayed in synchronization with the karaoke performance, and an inter-song program that presents various information related to the use of karaoke is broadcast between the songs of the karaoke performance. As shown in FIG. 4, for example, the program between songs is a fixed still image 21 with a picture of “Recommended song of the week” and a part 11 of a transparent color designated space 11 with a song name, a singer name, and a song selection number. Is composed of non-still images 11 that scroll.

  In this way, when the fixed still image data 21 and the non-still image overlay data 11 are combined and displayed on the same display 31 screen, when the luminance value for each pixel of the display screen is sampled and accumulated, FIG. In the scanning section A of the screen shown, the distribution of luminance integrated values as shown in FIG. 5 appears.

  That is, a cumulative value averaged like noise is distributed in the portion 11 where the moving image is displayed, and in the portion 21 where the same pattern is repeatedly displayed, a luminance bias correlated with the pattern appears. The high-luminance part and the low-luminance part stand out from the others, and the difference in cumulative values increases. This part makes the image sticking out.

  In particular, in the inter-music program, since a small number of still images such as recommended music as in the above example and new music information are repeatedly selected and displayed at the same place on the display 31 screen, a burn-in phenomenon is likely to occur.

The image sticking phenomenon can be prevented by changing the displayed picture as appropriate while avoiding the same picture on the display 31 from being repeatedly displayed.
In general, as a measure to prevent burn-in on a computer display, there is a method to switch to video display by activating a power-saving mode or screen saver that reduces the brightness when it is detected that it has not been operated for a certain period of time. Are known. However, the display of the karaoke apparatus cannot be regarded as not being used because the inter-music program is displayed as described above even during the inter-music (non-performance period).

  On the other hand, if you move and display regular still images of inter-program programs to prevent burn-in, it becomes very unnatural and difficult to see, and extra computer resources are reserved for such control. Will have to do.

  An object of the present invention is to provide a karaoke apparatus that displays a program between songs in an easy-to-view manner and prevents display burn-in by adding very simple control.

The karaoke apparatus according to the present invention is specified by the following items (1) to (7).
(1) A karaoke apparatus that includes a display, storage means, and control means, and displays an inter-program on the display during a period when the requested music is not registered in the queue. (2) The inter-program is a storage means. (3) Each fixed still image data stored in the storage means is configured by combining one fixed still image data extracted from a plurality of types of fixed still image data stored in the non-still image overlay data. (4) The display mode flag is displayed in the first mode in which the standard still image data is displayed with the same luminance, or the fixed still image data is displayed with the luminance changed. (5) When displaying the inter-program, the control means associates one fixed still image data with the corresponding one from the storage means. If the display mode flag is the first mode, the first process is performed, and if the display mode flag is the second mode, the second process is performed. (6) The first process is the fixed still image data. Is displayed as a component of an inter-program with the same brightness, and the display mode flag of the standard still image data in the storage means is changed to the second mode. (7) The second process is to display the standard still image data. The brightness is changed and displayed as a component of the inter-program, and the display mode flag of the fixed still image data in the storage means is changed to the first mode.

  Flags are managed for each standard still image data, and the display mode is changed for each opportunity to display the same still image. Therefore, the display mode does not change during one program and the screen is difficult to see, but burn-in is prevented. it can. Moreover, this control can be easily and inexpensively implemented by a very simple program processing.

  The karaoke apparatus of the present embodiment is a known communication karaoke terminal. That is, as illustrated in the block configuration of the karaoke device in FIG. 1, the central control unit 101 is a computer main body including a CPU, a RAM, and a ROM, and controls the peripheral components to control the karaoke device 100. . The hard disk 102 stores karaoke data including accompaniment music data mainly composed of MIDI data and lyric rendering data that is the origin of the generation of lyric images for a large number of karaoke songs. Also stored are moving image data for a long time in a predetermined format and script data defining the processing sequence of moving image data (such as the storage location and processing order of moving image data to be processed). Karaoke data and moving image data are supplied via a network interface 107 or a storage medium such as a DVD at an appropriate communication opportunity with the karaoke host device.

  The karaoke device 100 includes a user interface device 103 that receives a user's instruction input. The karaoke device 100 extracts karaoke data of the user's requested music and transfers the accompaniment music data to the synthesizer 104 to generate accompaniment music. Further, based on the lyric rendering data, the lyric image in which the portion to be sung is changed in color in synchronization with the accompaniment music is sequentially developed in the video memory (video RAM) 105 as a bitmap. Further, based on the script data, predetermined moving image data is sequentially transferred to the video control unit 106 in a predetermined order so that the background moving image of the lyrics image is decoded, and the lyrics image is superimposed on the decoded moving image and the display 31 is displayed. Display output.

  Furthermore, as will be described below, the karaoke apparatus 100 is configured to display and output an inter-song program appropriately designated on the display 31 during the non-performance period. In the karaoke apparatus 100, the program between songs is such that the fixed still image data 21 and the non-still image overlay data 11 illustrated in FIG.

  The fixed still image data 21 is a still image displayed in a stationary state at a fixed position on the display 31. In the example shown in the figure, a picture of “This week's recommended song” is displayed as a fixed still image data 21 at a fixed position (left end side) of the display 31. In addition, standard still image data 21 is also prepared in which a pattern such as “new music of this month” and “this week's ranking” is displayed in the same configuration.

  The non-still image overlay data 11 displays the singer name, music selection number, etc. of the music to be displayed as the recommended music of this week while scrolling on the display 31 although it is a fixed picture. The non-still image overlay data 11 is appropriately encoded, distributed via the communication interface 107, and stored in the hard disk 102, the RAM, or the like.

  In FIG. 2, the fixed still image data 21 and the non-still image overlay data 11 are combined so as to be displayed on the same screen. There are various methods for this composition processing. In this embodiment, the writing area to the video RAM 105 is divided into the fixed still image data 21 and the non-still image overlay data 11 and written to the video RAM 105, so The display position is sorted. That is, the non-still image overlay data 11 is written in the transparent color designation portion of the standard still image data 21.

  However, the present invention is not limited to this method. Moving image data such as background video is set as non-still image overlay data 11, and the NTSC video signal is switched at a predetermined synchronization timing, whereby non-still image overlay data 11 and fixed still image data 21 developed in the video RAM are used. A method of sorting and displaying on the display 31 via the video control unit 106 may be adopted.

  Here, each fixed still image data 21 is accompanied by a flag for designating a display mode. Based on this flag, the central control unit 101 of the karaoke apparatus 100 executes the control shown in FIG.

  First, it is searched whether or not an inter-program program display instruction command has been received. That is, it is detected whether or not it is a scene in which the fixed still image data 21 is displayed (S10). In this embodiment, the inter-program display instruction command is centrally controlled at predetermined occasions such as when the interval between songs (non-performance period) continues for a predetermined time or longer, or when the karaoke music selection operation is not performed for a predetermined time or longer. It is configured to be transmitted toward the unit 101.

  In addition to the case where the inter-program display instruction command is received, the fixed still image data 21 is displayed when an operation for displaying a predetermined still image at a fixed position on the display 31 is issued even during performance. Even when an event to be displayed occurs, the present invention may be applied to continue the following control.

  When the central control unit 101 of the karaoke apparatus 100 receives the display instruction command, the fixed still image data 21 of the inter-music program to be displayed is selected and read. At this time, the display mode flag added to the data in advance is set. Read (S11). Then, it is determined whether the read flag indicates luminance change or luminance unchanged (S12, S13).

  When the display mode indicates the luminance change mode (S12), when reading the fixed still image data 21 into the video RAM, the luminance of the pixels constituting the display image is changed all at once and the bitmap is developed (S14). .

  In the present embodiment, a process of inverting the luminance value of each pixel (taking 1's complement) is performed. That is, the luminance value of each pixel is expressed by a binary number, and a process of inverting the bit pattern of each digit is performed to obtain the changed luminance value. For example, when the luminance value of a certain pixel is 0, this is expressed as 00000000 in an 8-digit binary number, and its complement is taken to be 11111111 in an 8-digit binary number, that is, a decimal number of 255. To do.

  Note that the above inversion of the luminance value can be applied to the case where the data of each pixel is expressed by hue and luminance, but can also be applied to the case where the data of each pixel is expressed by the RGB method. That is, the color tone is changed by inverting the luminance value for each primary color element of each pixel. For example, when the RGB data of a certain pixel is R = 0, G = 0, B = 0, that is, black, it is changed to R = 255, G = 255, B = 255, that is, white. In this way, the color tone can be easily changed to a complementary color.

  With the above operation, for example, as shown in FIGS. 3A and 3B, a white character with a black outline becomes a black character with a white outline, but the character color and its background color are simultaneously reversed. Contrast is maintained and does not become difficult to read. Similarly, even in the case of characters and contours using intermediate colors, if the luminance of RGB data is changed, each is replaced with a catching color, so there is no problem in identifying the characters and contours.

  When the luminance change mode is instructed by the display mode flag as described above, this flag is changed to the luminance invariant mode after the above processing (S15). Thus, when the same standard still image data 21 is read next time, the accompanying flag indicates the luminance invariant mode.

  On the other hand, when the flag indicates the luminance invariant mode (S13), when the standard still image data 21 is read out to the video RAM 105, the bitmap is developed with the same luminance without changing the luminance (S16). If this display mode is executed, the flag is then changed to the brightness change mode (S17). As a result, at the next opportunity to display the same fixed still image data 21, the accompanying flag indicates the luminance change mode. Therefore, the fixed still image data 21 is displayed with the brightness changed at the next opportunity.

  As described above, the display mode flag is managed for each fixed still image data 21, and the luminance at the same location on the display 31 is appropriately set by changing / changing the luminance alternately at every display opportunity of the inter-program. Since it is changed, burn-in can be prevented.

It is a block diagram which shows schematic structure of a karaoke apparatus. It is a control process flowchart regarding the brightness change of a present Example. It is a figure which shows an example of the display display image in the case of brightness unchanged and brightness change. It is a figure which shows an example of the program between music displayed in a karaoke apparatus. It is a figure which shows the luminance distribution when a luminance distribution by fixed still image data and the still image are repeatedly displayed as they are.

Explanation of symbols

11 Non-still image overlay data 21 Standard still image data 31 Display 100 Karaoke device 101 Central control unit 105 Video RAM

Claims (1)

A karaoke apparatus comprising a display, a storage means, and a control means, and displaying an inter-song program on the display during a period when the requested song is not registered in the queue,
The inter-song program is composed of one fixed still image data extracted from a plurality of types of fixed still image data stored in the storage means and non-still image overlay data,
Each fixed still image data stored in the storage means is associated with a display mode flag,
The display mode flag designates a first mode in which the standard still image data is displayed with the same luminance or a second mode in which the standard still image data is displayed with the luminance changed.
When displaying the inter-program, the control unit extracts one fixed still image data and a display mode flag associated therewith from the storage unit, and performs the first process if the display mode flag is the first mode. If it is the second mode, perform the second process,
In the first process, the fixed still image data is displayed as a component of an inter-program with the same brightness, and the display mode flag of the fixed still image data in the storage means is changed to the second mode.
The second process is a karaoke apparatus that changes the brightness of the fixed still image data to display it as a constituent element of an inter-program, and changes the display mode flag of the fixed still image data in the storage means to the first mode.

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