JPH0279571A - Disk recording and reproducing device - Google Patents

Abstract

PURPOSE:To avoid the interruption of a program even when no decode processing is attained within a specified time by recording information on a disk in a form of a couple of digital picture information sets in which one pattern of digital still picture information is arranged after one pattern of digital character information. CONSTITUTION:A couple of sets of still picture information in which one pattern of still picture information is arranged after one pattern of character information are digitized and stored in a disk 1 as low-order 2-bit and a digital audio signal is recorded as high-order 14-bit. A signal extracted by a pickup 2 is processed digitally by a digital signal processing circuit 3 and separated into a digital audio signal 17 in high-order 14-bit and a digital picture signal 18 in low-order 2-bit and at first a digital character information signal 20 is outputted and then a digital still picture information signal 19 is outputted. Thus, even if a decode processing time of a digital still picture signal takes long and the processing by one pattern is not attained within the specified time, only the character information or the still picture of one preceding pattern is superimposed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a disc recording and reproducing apparatus for reproducing a disc on which still images are recorded.

BACKGROUND OF THE INVENTION FIG. 2 shows a diagram of a conventional disc recording/reproducing apparatus. A still image formed by inserting characters into a still image is digitized and a digital audio signal is recorded on the lower 2 bits and a digital audio signal on the upper 14 bits.The disc is played back by a pickup and the digital signal is processed. The digital still image signal is decoded and stored in frame memory. When one screen is stored in the frame memory, it is DA converted and output as a still image. At the same time, the digital audio signal is DA converted and output as an audio signal.

Problems to be Solved by the Invention In such a conventional configuration, if it takes a long time to decode the digital still image signal, there is a risk that a complete still image for one screen cannot be output within the specified time, and the audio It becomes difficult to get the timing with the signal.

In view of these points, the present invention outputs only text information, or outputs text on the still image one screen before, even if it takes a long time to decode a digital still image signal and it is not possible to process one screen within a specified time. An object of the present invention is to provide a disc recording/playback device capable of superimposing.

Means for Solving the Problems In order to solve the above problems, the present invention provides a system in which one screen of digital character information is followed by one screen of digital still image information, which is recorded in the form of a pair of digital image information. The apparatus is equipped with a decoding processing circuit for decoding a disc, a decoding circuit for decoding digital character information and digital still image information of a reproduction signal of the disc, and a function for superimposing and outputting the characters on the still image.

Effect: With the above-described configuration, the present invention outputs only character information or outputs the still image from one screen before, even if the decoding process of a digital still image signal takes a long time and it is not possible to process one screen within a specified time. You can superimpose text on the .

Embodiment FIG. 1 shows a block diagram of an embodiment of the disc recording/reproducing apparatus of the present invention. 1 digitizes a pair of still image information in which one screen's worth of still image information is placed after one screen's worth of character information, and the lower two bits are digitalized, and the digital audio signal is placed as the upper one.
On a disc recorded in 4 bits, the signal taken out from the disc 1 by the pickup 2 is digitally processed by the digital signal processing circuit 3, and is converted into a digital audio signal 17 of the upper 14 bits and a digital image signal 1 of the lower 2 bits.
It is separated into 8 parts. The digital audio signal 17 is DA-converted by the DA converter 4, and an analog audio signal is output from the audio output terminal 15. The digital image signal 18 is decoded by the decoding circuit 5 and outputs first a digital character information signal 20 and then a digital still image information signal 19.

The digital character information signal 20 is stored in the character memory 11 and converted from DA to DA converter 12 to become character information. The digital still image information signal 19 is stored in the frame memory 6 from the switch 13-a, and when it is stored in memory for one screen, it is passed through the switch 14a and converted from digital to analog by a DA converter to become still image information.

Further, a superimpose circuit 8 superimposes character information on the still image information and outputs the resultant image from a terminal 16 as a still image. The next digital still image information signal is stored in the frame memory 10 through the switch 13a,
When one screen is stored in memory, the switch 14b is turned to switch to the next still image.

Effects of the Invention As described above, the present invention is recorded on a disk in the form of a pair of digital image information in which one screen of digital character information is followed by one screen of digital still image information. Digital character information is first processed and output by the decoding circuit, and even if the amount of digital still image information is too large to be decoded within the specified time, switch 14 is switched to output only the character information or the (N-1)th Program interruption can be avoided by superimposing the Nth character information on the screen.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a disc recording/reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional disc recording/reproducing apparatus. ■...disk, 2...pickup, 3...digital signal processing circuit, 4...audio DA converter,
5... Decoding circuit, 6.10... Frame memory, 7.12... Video & JT] DA converter, 8...
Superimpose circuit, 11...Character memory, 13
... Input changeover switch, 14 ... Output changeover switch, 15 ... Audio output terminal, 16 ... Still image output terminal, 17 ... Digital audio signal, 18 ...
Digital image signal, 19... Digital still image information signal, 20... Digital character information signal. Name of agent: Patent attorney Shigetaka Kurino (1 person)
, To1 Figure 2

Claims (3)

[Claims] (1) The digital character information and digital still image information of the playback signal of the disc are recorded in the form of a pair of digital image information in which one screen of digital still image information is placed after one screen of digital character information. A disc recording and reproducing device includes a decoding processing circuit that decodes the text, and a function of superimposing and outputting the text on the still image. (2) The disk recording and reproducing apparatus according to claim 1, which outputs only characters without outputting still images. (3) The disk recording and reproducing apparatus according to claim 1, wherein the Nth character is superimposed on the (N-1)th still image and output.