JPH07182794A - Information recording medium and reproducing device - Google Patents

Abstract

PURPOSE:To improve the quality of a picture of animation data by using plural reproducing devices in a reproducing device. CONSTITUTION:A medium reading section 3 reproduces standard information from a standard information recording medium 1. A medium reading section 4 reproduces expanded information from an expanded information recording medium 2. A synchronizing section 5 makes the medium reading section 3 and the medium reading section 4 drive synchronously. A medium control processing section 6 in which a memory is incorporated performs processing using the standard information and the expanded information, and an output processing section 7 outputs a video output 8 and a voice output 9 from an output processed by the medium control processing section 6. By using the above- mentioned constitution, a picture of high quality can be reproduced and quality of a picture is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording medium in which extended information relating to ordinary information is recorded on a medium in which ordinary information is recorded, and synchronization is made from each medium in which standard information and extended information are recorded. The present invention relates to a reproducing device that reproduces a video output and an audio output by controlling while taking the above.

[0002]

2. Description of the Related Art In recent years, information recording media and reproducing devices have come to handle multimedia information such as image information, computer programs and data in addition to conventional audio information. Above all, since images deal with moving images, compression techniques are being standardized internationally. The moving image information has a larger amount of information than a normal still image, the current standard image quality is at the level of home VHS (registered trademark) video, and in the current situation, the roughness of the image quality is noticeable in movies and the like.

FIG. 3 is a diagram showing the structure of a conventional reproducing apparatus for reading a medium. In FIG. 3, 1 is a standard information recording medium, 3 is a medium reading unit, 7 is an output processing unit, 8 is a video output, 9 is an audio output, and 10 is a medium control processing unit. Figure 4
Shows a standard format in a conventional information recording medium, in which information is recorded in a frame unit corresponding to one image.

Next, the operation of the conventional reproducing apparatus having the above structure will be described. In FIG. 3, when the standard information recording medium 1 on which information is recorded is inserted into the medium reading unit 3 and operated, the medium control processing unit 10 reads the data in the standard information recording medium 1 into the medium control processing unit 10. Be done.

The standard information recording medium 1 reduces the number of pixels of image information to be encoded as in the format shown in FIG. 4, the image is composed of several blocks, orthogonally transformed for each block, quantized and compressed. The image is encoded and recorded on the medium. As for a signal having a strong correlation as a means for compressing information, when viewed on the frequency axis, signal power is concentratedly distributed to a specific frequency component. If only the coefficients of the components distributed by concentrating the signal power are encoded, the total amount of information can be reduced. Known as the transform to the frequency domain is the Fourier transform, which involves complex arithmetic
Since the configuration becomes complicated, an orthogonal transform instead of this is used in image coding.

The data read in the medium control processing unit 10 is decoded and is converted into a video output 8 and an audio output 9 through the output processing unit 7.

[0007]

However, the image quality that can be dealt with by the above-mentioned conventional configuration is a VHS video level for home use, and there is a problem that it is not possible to deal with high image quality and long-time playback. It was

In order to solve this problem, a method is conceivable in which standard information is recorded for each unit length and extended information is recorded on a medium for recording information, and the information is reproduced by a dedicated reproducing device. It is necessary to add an identification signal for distinguishing between standard information and extended information.

The present invention solves the above-mentioned conventional problems by using a medium having an area for storing extended information related to the normal information other than the medium recording the normal information for each unit length. Then, in addition to the conventional standard information, it is an object of the present invention to provide a reproducing apparatus for reproducing an image having a higher image quality than the conventional standard image quality by utilizing the information for extension.

[0010]

In order to achieve this object, an information recording medium of the present invention is a medium different from a medium in which ordinary information is recorded for each unit length, and is related to the ordinary information. The extension information is recorded.

In order to achieve the above object, the reproducing apparatus of the present invention comprises a first medium reading means for reproducing a medium in which normal information is recorded for each unit length, and extended information related to the normal information. For reproducing the information recording medium on which is recorded
Of the medium reading means, synchronizing means for synchronizing the respective information output from the first medium reading means and the second medium reading means, and output from the first and second medium reading means. It has a medium control processing means having a built-in memory for processing each information, and an output processing means for processing the information from the medium control processing means into a video signal and an audio signal and outputting them.

[0012]

According to the present invention, with the above-described structure, it is possible to cope with high image quality by using the medium on which the standard information is recorded and the information recording medium on which the extended information related to the normal information is recorded. Become.

Further, if the medium on which the standard information is recorded and recorded is used, the conventional image quality can be obtained, and the medium on which the standard information is recorded and recorded and the information recording medium on which the extended information is recorded are synchronously operated. By reproducing each of them and using each reproduction output, a high-quality reproduced image can be obtained.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of an information recording medium and a reproducing apparatus of the present invention. In FIG. 1, 1 is a standard information recording medium, 2 is an extended information recording medium, 3 is a medium reading unit (1), 4 is a medium reading unit (2), 5 is a synchronizing unit, 6
Is a medium control processing unit having a built-in memory, 7 is an output processing unit,
8 is a video output, and 9 is an audio output.

FIG. 2 is a diagram showing a format of compressed image data in the embodiment of the present invention. The compressed image is divided into frames, and the conventional standard recording information is recorded on the standard information recording medium 1 shown in FIG. Extended data of the compressed image, that is, extended extended recording information is recorded on the extended information recording medium 2.

Next, the operation of the information recording medium and the reproducing apparatus of the present invention having the above-mentioned configurations will be described.

In FIG. 1, when the standard information recording medium 1 on which the information is recorded and the extended information recording medium 2 on which the extended information is recorded are inserted into the medium reading unit 3 and the medium reading unit 4, respectively, and operated, the synchronization occurs. The medium reading unit 3 and the medium reading unit 4 are synchronized by the unit 5, and standard recording information on the standard information recording medium 1 and extended recording on the extended information recording medium 2 are controlled by the medium control processing unit 6 having a built-in memory. Information is alternately read into the memory in the medium control processing unit 6 having the built-in memory.

The moving picture information recorded on the medium is divided into an odd field and an even field, respectively. The information taken in the medium control processing unit 6 having a built-in memory is encoded and decoded in frame units,
The signal sent to the output processing unit 7 is divided into a video signal and an audio signal, which are output as a video output 8 and an audio output 9, respectively.

[0020]

As described above, according to the present invention, it is possible to reproduce a high quality image by using the extended information recording medium in addition to the standard image reproduction using the conventional standard information recording medium. Becomes

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a playback device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a format of compressed image data in the embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a reproducing device in a conventional example.

FIG. 4 is a schematic diagram showing a format of compressed image data in a conventional example.

[Explanation of symbols]

 1 Standard Information Recording Medium 2 Extended Information Recording Medium 3 Medium Reading Unit (1) 4 Medium Reading Unit (2) 5 Synchronization Unit 6 Medium Control Processing Unit with Built-in Memory 7 Output Processing Unit 10 Medium Control Processing Unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04N 5/93

Claims (2)

[Claims] 1. An information recording medium, which is a medium different from a medium in which normal information is recorded for each unit length, and in which extended information related to the normal information is recorded. 2. A first medium reading means for reproducing a medium on which normal information is recorded for each unit length, and a second medium reading for reproducing an information recording medium on which extended information related to the normal information is recorded. Means, synchronization means for synchronizing the respective information output from the first medium reading means and the second medium reading means, and respective information output from the first and second medium reading means A reproducing apparatus comprising: a medium control processing unit having a built-in memory for performing the processing of 1. and an output processing unit for processing and outputting information from the medium control processing unit into a video signal and an audio signal.