JPH07250305A - Time-shift television receiver - Google Patents

Abstract

PURPOSE:To allow a user to watch a broadcast program from the beginning by reading a video signal stored temporarily in a storage device from a certain time. CONSTITUTION:A video signal received from an antenna terminal 101 is decoded into a video signal of a base band by a tuner 102 and displayed on a display device 107 via a selection circuit 106. Simultaneously the video signal from the tuner 102 is given to a compression circuit 103, in which the signal is digitized and its information quantity is compressed. The compressed video signal is given to a storage device 104, where it is stored. The video signal stored in the storage device 104 is read after a time delay according to the request by the user and restored into the video signal by an expansion circuit 5. Then the video signal is displayed on the display device 107 via the selection circuit 106. Thus, the user watches a program having been broadcast at a point of time designated by the user from a designated time and advantages not overlooking a first half or the like of the program are obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal display device, and more particularly to a television device which has a storage device and can display an input video signal with an arbitrary time delay.

[0002]

2. Description of the Related Art MUSE, which is a compression system for high-definition television in Japan, ATV system in the United States, and M, which is a unified standard intended for application to package media.
Technological development for compressing the information amount of a video signal using a digital technique such as PEG is progressing at a remarkable speed. These technologies not only enhance the quality of video signals to enhance user satisfaction, but also contribute to downsizing of packages. In addition to such applications, the digital compression technique for video signals is about to be applied to the multichannelization of CATV as described in Television Society Journal Vol.47 No.81993. In CATV, it has become possible to transmit video signals of several hundred channels by replacing the existing coaxial cable with an optical cable and making full use of digital compression and digital modulation technologies. By realizing such multi-channels, we will provide new services such as near-on-demand that allow the same program to be broadcast many times at fixed time intervals, allowing viewers to start watching at any time. Has become possible. Furthermore, an on-demand service that immediately broadcasts a program according to a user's request is also considered. According to such a service, the viewer can freely enjoy the television broadcast without being restricted by the broadcast time zone.

[0003]

If services such as on-demand can be provided in this way, it is considered that the time constraint of the user is almost eliminated, and the television service becomes almost complete.

However, these services can be provided only in an area where the infrastructure such as optical cable is completely established, and it is unlikely that the service can be implemented in an area such as Japan where the CATV network is not well developed. . Although services such as on-demand are important for software such as movies, it is difficult for the transmitting side to completely meet the demands of viewers even for services of programs such as news and sports that require real-time performance. In this way, services such as on-demand can be received only in areas where the infrastructure is in place, and in such areas viewers have no choice but to have time constraints regarding broadcast programs. It is required to reduce the physical constraints.

In view of the above problems, it is an object of the present invention to allow a television broadcast being broadcast to be viewed even if the time is delayed in order to minimize the time constraint of the viewer.

[0006]

Means for Solving the Problems The above-mentioned problems include a compression means for inputting a video signal and compressing the information amount of the video signal,
Means for storing the output signal of the compression means, decompression means for decompressing the output signal of the storage means to reproduce the original video signal, selection means for switching the input video signal and output signal of the decompression means, and the selection It can be achieved by comprising a display means for displaying the output signal of the means.

[0007]

The compression means digitizes the input video signal and compresses the information amount of the video signal in order to minimize the capacity of the pre-storage means. The video signal with the compressed information amount is stored and stored in the storage means. The video signal compressed after being delayed by the storage means is read out and restored by the expansion means into a displayable video signal. The restored video signal is supplied to the display device through the selection circuit and displayed.

Therefore, when the video signal from the storage means is displayed, the video signal delayed by an arbitrary time can be supplied to the viewer.

[0009]

FIG. 1 shows an embodiment of the present invention. In FIG. 1, 101 is an antenna terminal for receiving a video signal, 102
Is a tuner for demodulating the video signal from the antenna terminal 101 and converting it into a baseband signal, 103 is a compression circuit for digitizing the baseband video signal and compressing the amount of information, and 104 is a temporary storage of the compressed video signal. Storage device, 105 is a decompression circuit that restores the compressed video signal read from the storage device, and 106 is a tuner 102.
Is a selector circuit for switching the video signal from the selector circuit 105 and the video signal from the expansion circuit 105, and 107 is a display device for displaying the video signal from the selector circuit 106.

The video signal input from the antenna terminal 101 is restored to the baseband video signal by the tuner 102, and then displayed on the display device 107 through the selection circuit 106. At the same time, the video signal from the tuner 102 is supplied to the compression circuit 103 and the amount of information is compressed. In the current technology, if it is assumed that the video with the image quality equivalent to the current VTR is reproduced, the video of standard broadcasting (NTSC etc.) transmitted in the band of 6 MHz should be compressed to about 1.5 Mb / s. Is possible. If an algorithm standardized by MPEG1 is used, the compression circuit 103 causes a VTR having a bit rate of 1.5 Mb / s.
A considerable signal is obtained. If the input video signal is a high-definition television signal, it is 10 Mb / s using the MPEG2 algorithm.
It only has to be compressed to a certain degree.

The video signal thus compressed is supplied to and stored in the storage device 104. The storage medium includes, for example, a hard disk device or an optical disk device, and these storage devices are not intended to semi-permanently store a video signal as in the object of the present invention, but are used as a temporary storage means. Has sufficient storage capacity. The expansion circuit 105 restores the video signal compressed by the compression circuit 103, and has a signal processing circuit corresponding to the compression circuit. The video signal temporarily stored in the storage device 104 is read out after a time delay according to the user's request, and then read out, and displayed on the display device 107 via the selection circuit 106.

For example, when the user starts watching the program 5 minutes after the program starts, the video signal 5 minutes before is read from the storage device, and the input video signal is compressed by the compression circuit 103.
The compressed data is stored in the storage device 104. Since the storage device 104 has a plurality of heads, a plurality of storage media, etc., it is possible to read the current program while storing it.

As described above, according to the present embodiment, it is possible to view the program broadcast at the time before the time specified by the viewer from the specified time, and there is an advantage that the first half of the program is not missed. To have.

FIG. 2 shows another embodiment of the present invention. Figure 2
In the figure, 201 is a timing circuit for timing time information, 20
Reference numeral 2 is a compression circuit for synthesizing the video signal and the time information from the clock circuit 201 to compress the amount of information, and the others are the same as those in the embodiment of FIG. This embodiment is characterized in that time information is added to the information to be compressed. The present invention aims at allowing a viewer to later watch a program that has already been broadcast, and it is highly necessary to confirm the time when the program being watched starts. In the present embodiment, the data stored in the storage device 104 is a compressed video signal and time data. Therefore, the decompression circuit 105 can reproduce the video signal as well as the broadcast time information of the video signal. . Therefore, the time information can be combined with the video signal and displayed. Further, it has a feature that the sector information of the storage device in which the video signal designated by the viewer is recorded can be relatively easily retrieved from the time information.

According to this embodiment, it is possible for the viewer to confirm whether the video being shifted in time is the current video or the past video, or the broadcast time of the past video. Have the advantage of.

FIG. 3 shows another embodiment of the present invention. Figure 3
, 301 is a first storage device for temporarily storing a compressed video signal, 302 is a second storage device for storing time information and sector information of the first storage device, 3
Reference numeral 03 is a control circuit for the first storage device 301 and the second storage device 302, and the rest is the same as the embodiment of FIG.
In this embodiment, the control circuit 303 includes the first storage device 3
The sector information storing the video signal in 01 is supplied to the second storage device 302, and the time information from the clock circuit 201 and the sector information are controlled to be stored in the second storage device 302. When reproducing the video signal stored in the first storage device, the control circuit 303 reads the time specified by the viewer from the second storage device 302, and the video signal of the specified time is recorded. The sector information is read, the video signal of the designated sector is read from the first storage device 301, and the video signal is reproduced. That is, the second storage device 302 is the first storage device 301.
As a result, the viewer can specify the time to immediately retrieve the specified video signal from the first storage device 301. Further, the second storage device 302 only needs to have a storage capacity for time information and sector information, and the operating speed can be increased by using a semiconductor memory or the like.

According to the present embodiment, the address of the storage device storing the video signal at that time can be easily specified by the viewer's time specification, and the system has improved operability.

FIG. 4 shows another embodiment of the present invention. Figure 4
In the figure, reference numeral 401 denotes a synthesizing circuit for synthesizing the video signal and the time display data.
In this embodiment, the time information on the broadcast of the displayed video signal obtained from the second storage device 302 is combined with the synthesizing circuit 401.
, And can be displayed on the display device 107 as a video signal. Therefore, the present embodiment has an advantage that time information can be displayed in addition to the embodiment shown in FIG.

FIG. 5 shows another embodiment of the present invention. Figure 5
In FIG. 1, reference numeral 501 is a video signal reduction circuit, 502 is a selection circuit, and the others are the same as those in the embodiment shown in FIG. This embodiment basically operates in the same way as the embodiment of FIG. However, in the embodiment of FIG. 1, there are two video signals, the input video signal and the past video signal read from the storage device 104 and then expanded. Therefore, the currently broadcast video and the past video can be displayed at the same time by using the so-called picture-in-picture technique of the dual-screen television. The reduction circuit 501 uses a memory to reproduce a child screen from a video signal to be displayed as a child screen, that is, an output signal of the tuner 102 or an output signal of the decompression circuit 105. The selection circuit 502 can switch the video signal to be the parent screen and the child screen signal output from the reduction circuit 501 to display the parent and child two screens.

According to this embodiment, there is an advantage that the past video signal and the current video signal can be viewed on the same screen. This embodiment can be similarly applied to the embodiments of FIGS. 2, 3 and 4.

FIG. 6 shows another embodiment of the present invention. Figure 6
601 is an antenna terminal to which a digitally modulated video signal is input, 602 is a tuner that demodulates to a baseband video signal, 603 is a storage device that stores the output signal of the tuner 602, and 604 is an output signal of the tuner 602. A selector for switching the output signal of the storage device 603, a decompression circuit 605 for decompressing the output signal of the selector 604 and converting it into an uncompressed displayable video signal, 60
A display device 6 displays the output signal of the expansion circuit 605. 6 is composed of the same blocks as the embodiment of FIG. 1, except that the compression circuit 103 is omitted and the decompression circuit 605 is connected to the subsequent stage of the selector 604. In the present embodiment, it is assumed that the video signal input from the antenna terminal 601 has been compressed by digital processing and is a digitally modulated signal. Examples of such a signal include ATV broadcasting which is currently being implemented in the United States, digital broadcasting by CATV, and the like. Therefore, when such a digital broadcast is received, the compression circuit 103 used in the embodiment of FIG. 1 is not necessary, and the signal is directly written into the storage device 603 after demodulated into a baseband signal by the tuner 602. be able to. Other configurations and operations are the same as those of the embodiment shown in FIG. According to this embodiment, it is possible to display a time-delayed image without having a compression circuit.

FIG. 7 shows another embodiment of the present invention. Figure 7
, 701 is a clock circuit for generating time information, and 70
Reference numeral 2 is a synthesizing circuit for synthesizing the video signal and the time information from the clock circuit 701, and the other components are the same as those in the embodiment of FIG. In this embodiment, the clock circuit 7 is applied to the input digital video signal.
The time information output from 01 is combined by the combining circuit 702 and then stored in the storage device 603. For example, the synthesizing circuit 702 may detect the time information writing area in the compressed digital signal format and rewrite it with the current time information.

According to this embodiment, since the time information can be read out from the storage device 603 at the same time as the video signal, the viewer can know the broadcast time of the video signal being displayed. Have the advantage of.

FIG. 8 shows another embodiment of the present invention. Figure 8
801 is a first storage device for temporarily storing a compressed video signal, and 802 is time information and a first memory 801.
Second storage device 803 for storing the sector information of the
7 is a control circuit for controlling the storage device 801 and the second storage device 802, and other points are the same as those in the embodiment of FIG. The present embodiment is an embodiment for obtaining the same effect as the embodiment of FIG. 3, and the time information from the clock circuit 701 is stored in the second storage device 802 instead of the first storage device 801. Is characterized by. Further, the second memory device 802 is controlled by the control circuit 803 at a certain time to the first memory device 8
The information of the sector written in 01 is also written.
Therefore, when the viewer wants to display the stored video signal, the time information stored in the second storage device 802 and the sector information of the first storage device 801 corresponding to the time information are read. By starting the reading of the first storage device from the sector, the video signal from the time requested by the viewer can be displayed. In the present embodiment, unlike the embodiment of FIG. 7, not only the composition of time information and video information is unnecessary, but also the information from the second storage device 802 is read by the first storage device 801. Has the advantage of instant access to the starting position. In this embodiment, the second storage device 8 is used as in the embodiment of FIG.
It is also possible to display the time information by converting the time information obtained from No. 02 into a displayable form and synthesizing it with a video signal.

FIG. 9 shows another embodiment of the present invention. Figure 9
901 is a first decompression circuit for reproducing a compressed video signal into an original video signal, 902 is a secondary compression circuit for further increasing the compression rate of the compressed video signal, and 903 is compressed by the secondary compression circuit 902. This is a second decompression circuit for reproducing the original video signal from the other video signal, and the rest is the same as the embodiment of FIG. In the present embodiment, it is premised that the input video signal is a digitally band-compressed signal and that this band-compression method is stepwise processed in terms of compression rate. For example, a compressed signal is divided into a basic component and a high-definition information component, and if reproduced with only the basic component, an image quality of about VTR can be obtained. This is the case where the compression method is configured to obtain the image quality of. If it is assumed that the information rate of only the basic component is about 1.5 Mb / s and the transmission rate including the high-definition information component is 6 Mb / s, the storage capacity of the storage device 603 is four times different. Secondary compression circuit 9
02 operates to remove the high-definition information component from the input video signal of the above format and extract only the basic component. Therefore, the capacity of the storage device 603 can be reduced, and long-term storage is also possible. Here, the first expansion circuit 901 expands both the basic component and the high-definition information component to reproduce the original signal, and the second expansion circuit 903 expands only the basic component to generate the video signal. Is to be played. According to the present embodiment, by using the secondary compression circuit 902, there is an advantage that the capacity of the storage device 603 can be reduced and the storage time can be extended. If the first decompression circuit 901 is divided into a decompression operation part for the basic component and a decompression operation part for the high-definition component, this decompression operation part for the basic component is used instead of the second decompression circuit 903. It is also possible to do so.

FIG. 10 shows another embodiment of the present invention. In FIG. 10, reference numerals 1001 and 1002 are the same as in the embodiment of FIG. 9 except for the selection circuits. In this embodiment, the tuner 60
It is characterized in that the video signal from the second video signal and the video signal from the secondary compression circuit 902 with a higher compression rate can be selected and stored in the storage device 603. Therefore, if you want to display a high-quality image, although the time to temporarily store becomes shorter,
The selection circuit 1001 is connected to the a side, and the video signal that is not secondarily compressed is stored in the storage device 603. In this case the first
Since it is necessary to restore the original video signal by the decompression circuit 901, the selection circuit 1002 is on the d side and the selection circuit 604 is on the e side.
Connected to the side. On the other hand, when the temporary storage for a long time is required, the image quality deteriorates, but the compression rate is increased by the secondary compression circuit 902, the selector 1001 is connected to the b side, and the selector 604 is connected to the f side. The second expansion circuit 9 as in the embodiment of FIG.
The video signal is restored by 03. As described above, according to the present embodiment, the quality of an image to be temporarily stored and then reproduced can be selected according to the usage conditions of the viewer, and a high quality video signal can be obtained when the storage time is short.

FIG. 11 shows another embodiment of the present invention. In FIG. 11, reference numeral 1101 denotes a clock circuit that generates time information,
Reference numeral 1102 denotes a synthesizing circuit for synthesizing the compressed video signal and the video signal supplied from the timing circuit 1101. Others are the same as those in the embodiment of FIG. Similar to the embodiment of FIG. 7, this embodiment has a feature that, when displaying the temporarily stored video signal, the time information when the displayed video signal is actually broadcast can also be displayed. The synthesizing circuit 1102 synthesizes the time information with the compressed video signal from the tuner 602 and supplies the time information to the secondary compression circuit 902, and the signal with the increased compression rate is stored in the storage device 603. Therefore, when the video signal is read from the storage device 603, the time information can be reproduced and the time information can be displayed.

FIG. 12 shows another embodiment of the present invention. In FIG. 12, 1201 is a first storage device that stores a compressed video signal, 1202 is a second storage device that stores time information and sector information of the first storage device, 1203 is a first and second storage device. This is a control circuit for controlling the memory device, and other aspects are the same as those of the embodiment of FIG. In the present embodiment, similarly to the embodiment of FIG. 8, the second storage device 1202 stores the time information from the clock circuit 1101 and the sector information of the second storage device 1201 storing the video signal at the same time. Remember. Therefore, the broadcast time of the video information stored in the first storage device 1201 and the stored sector information can be read out from the second storage device 1202, and the video can be immediately displayed by the viewer's time designation. The signal can be read from the first storage device 1201. Also, as in the embodiment of FIG. 4, the second storage device 120
It is also possible to convert the time information of 2 into video data and display it.

FIG. 13 shows another embodiment of the present invention. In FIG. 13, a first decompression circuit 1303 for reproducing a video signal compressed by 1301, a compression circuit 1302 for compressing the information amount of the video signal, and a second expansion circuit 1303 for decompressing the video signal compressed by the compression circuit 1302. A circuit 1304 is a selection circuit for switching the output signals of the first expansion circuit 1301 and the second expansion circuit 1303. In the present embodiment, unlike the embodiment of FIG. 9, it is assumed that the compressed video signal from the tuner 602 has a format in which it is difficult to perform secondary compression as it is. Therefore, after the signal input from the tuner 602 is restored to the original video signal in the first decompression circuit 1301, the signal to be stored is compressed in the compression circuit 1302. Other operations are similar to those of the embodiment shown in FIG. 9, and detailed description thereof will be omitted. According to the present embodiment, the video signal can be temporarily stored, time-shifted, and read out regardless of the compression method of the transmitted video signal.

FIGS. 14, 15, and 16 show another embodiment in the case where the video signal assumed in FIG. 13 is input. In FIG. 14, 1401 and 1402 are selection circuits, in FIG. 15, 1501 is a timing circuit, 1502 is a compression circuit, and in FIG. 16, 1601 is the first storage device, 16
Reference numeral 02 is the second storage device, 1603 is a control circuit for controlling the first and second storage devices 1601, 1602, and others are the same as in the embodiment of FIG.

The embodiment of FIGS. 14, 15 and 16 is shown in FIG.
This embodiment achieves the functions shown in the embodiments of FIGS. 10, 11 and 12 for the embodiment of FIG. That is, in the embodiment of FIG. 14, the quality of the stored image can be selected by switching the selectors 1401 and 1402, and in the embodiment of FIG. 15, the time information can be displayed. Further, in the embodiment shown in FIG. 16, the access to the first storage device can be speeded up.

When two decompression circuits are provided as in these embodiments, as shown in the embodiment of FIG.
By providing the reduction circuit, it is obvious that both the screen of the currently transmitted video signal and the screen of the past video signal can be simultaneously displayed by a function such as picture-in-picture. Further, in the case of having two storage devices as shown in FIGS. 12 and 16, it becomes possible to take out time information from the second storage device, synthesize it with a video signal, and display it.

[0033]

According to the present invention, since the video signal temporarily stored in the storage device can be read out from an arbitrary time, the program can be viewed from the beginning even if it is not the start time of the program. effective. Further, the time when the displayed program is broadcast can be confirmed, and the viewer's confusion can be avoided. In addition, the capacity of the storage device is reduced and the configuration is excellent in accessibility.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is a block diagram showing a third embodiment of the present invention.

FIG. 4 is a block diagram showing a fourth embodiment of the present invention.

FIG. 5 is a block diagram showing a fifth embodiment of the present invention.

FIG. 6 is a block diagram showing a sixth embodiment of the present invention.

FIG. 7 is a block diagram showing a seventh embodiment of the present invention.

FIG. 8 is a block diagram showing an eighth embodiment of the present invention.

FIG. 9 is a block diagram showing a ninth embodiment of the present invention.

FIG. 10 is a block diagram showing a tenth embodiment of the present invention.

FIG. 11 is a block diagram showing an eleventh embodiment of the present invention.

FIG. 12 is a block diagram showing a twelfth embodiment of the present invention.

FIG. 13 is a block diagram showing a thirteenth embodiment of the present invention.

FIG. 14 is a block diagram showing a fourteenth embodiment of the present invention.

FIG. 15 is a block diagram showing a fifteenth embodiment of the present invention.

FIG. 16 is a block diagram showing a sixteenth embodiment of the present invention.

[Explanation of symbols]

101, 601 ... Video signal input terminal, 102, 602
... tuner, 103, 1302, 1502 ... compression circuit,
104, 301, 302, 603, 801, 802, 1
201, 1202, 1601, 1602 ... Storage device, 1
05,605,901,903,1301,1303 ...
Expansion circuit, 106, 502, 604, 1001, 100
2, 1401, 1402 ... Selection circuit, 107 ... Display device, 201, 701, 1101, 1501 ... Clock circuit,
303, 803, 1203, 1603 ... Control circuit, 40
1, 702, 1102 ... Combining circuit, 501 ... Reduction circuit,
902 ... Secondary compression circuit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisjun Tajima 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Stock Company Hitachi Ltd. AV Equipment Division

Claims (21)

[Claims] 1. A demodulation means for receiving an input video signal and demodulating it into a baseband signal, a compression means for compressing the information amount of the output signal of the demodulation means, and a first storage means for temporarily storing the output signal of the compression means. Storage means, expansion means for expanding the output signal of the first storage means, selection means for switching between the output signal of the demodulation means and the output signal of the expansion means, and a display for displaying the output signal of the selection means. A time-shift television apparatus, comprising: means for displaying a video signal of an arbitrary time before by temporarily storing the received video signal. 2. The time-shift television apparatus according to claim 1, further comprising a time measuring means for measuring time information of receiving the input video signal, wherein the compressing means synthesizes the video signal and the time information and compresses them. A time-shift television device characterized in that when the temporarily stored video signal is displayed after an arbitrary time has elapsed, the time information when the video signal to be displayed is received can also be displayed. 3. The time shift television apparatus according to claim 1, wherein a time measuring means for measuring time information of receiving the input video signal, an output signal of the time measuring means and a sector of the first storage means. When a second storage means for storing information and a control means for controlling the first and second storage means are provided and the video signal temporarily stored in the first storage means is displayed after an arbitrary time has passed, A time-shift television apparatus, wherein a video signal is read from the first storage device based on the time information stored in the second storage means and the sector information of the first storage device. 4. The time shift television apparatus according to claim 3, wherein the time information can be displayed by synthesizing the video signal output from the selection means and the time information output from the second storage means. A time-shift television device characterized in that a time when a video signal to be displayed is received can be displayed by providing a synthesizing means. 5. The time-shift television apparatus according to claim 1, wherein the video signal output from the demodulating means and the reducing means for selectively reducing the output signal of the expanding means, and the output signal of the demodulating means. A selection means for selecting the output signal of the expansion means and the output signal of the reduction means and supplying it to the display means is provided, and the video signal currently being received and the video signal temporarily stored and delayed are displayed on the same display screen. A time-shift television device characterized by displaying. 6. A device for receiving and displaying a video signal in which the amount of information is compressed, and demodulating means for demodulating the video signal into a baseband signal, and first storage means for storing an output signal of the demodulating means. Selecting means for switching the output signal of the demodulation means and the output signal of the first storage means, decompression means for decompressing the compressed video signal from the switching means into a displayable video signal, A time-shift television apparatus comprising display means for displaying the signal of the expanding means and displaying the video signal of an arbitrary time before by temporarily storing the received video signal. 7. The time-shift television apparatus according to claim 6, wherein the clock means for clocking the time information of receiving the input video signal, the output signal of the clock means and the output signal of the demodulator are combined. And outputting the signal output from the synthesizing means to the storage means so that the time when the video signal is received can be displayed when the video signal stored in the storage device is displayed. Time-shift television device. 8. A time-shift television apparatus according to claim 6, wherein time measuring means for measuring time information of receiving said input video signal, output signal of said time measuring means and sector of said first storage means. When a second storage means for storing information and a control means for controlling the first and second storage means are provided and the video signal temporarily stored in the first storage means is displayed after an arbitrary time has passed, A time-shift television apparatus, wherein a video signal is read from the first storage device based on the time information stored in the second storage means and the sector information of the first storage device. 9. The time shift television apparatus according to claim 8, wherein the time information can be displayed by synthesizing the video signal output from the expansion means and the time information output from the second storage means. A time-shift television apparatus characterized in that a time when a video signal to be displayed is received can be displayed by providing a synthesizing means for supplying to a display means. 10. An apparatus for receiving and displaying a video signal having a compressed information amount, and demodulating means for demodulating the video signal into a baseband signal, and an output signal of the demodulating means being expanded into a displayable video signal. First decompression means for converting, secondary compression means for increasing the compression rate of the output signal of the demodulation means, first storage means for storing the output signal of the secondary compression means, and the first storage means. Second decompression means for decompressing the output signal of the first decompression means and converting it into a displayable video signal, first selection means for switching between the output signal of the first decompression means and the output signal of the second decompression means, A time-shift television apparatus, comprising display means for displaying an output signal of the first selecting means, wherein the received video signal is temporarily stored and displayed after an arbitrary time has elapsed. 11. The time shift television apparatus according to claim 10, further comprising a second selecting means for switching between the output signal of the demodulating means and the output signal of the secondary compressing means and supplying the output signal to the first storing means. Third switching means for switching between the output signal of the demodulation means and the output signal of the first storage device and supplying it to the first expansion means is provided, and is temporarily stored in the first storage means and then read out. A time shift television device characterized in that a compression rate of a video signal to be displayed can be selected. 12. The time-shift television device according to claim 10, wherein a clocking means for clocking time information of receiving the input video signal, an output signal of the clocking means and an output signal of the demodulating means are combined. Then, the time shift television apparatus is provided with a synthesizing means for supplying to the secondary compression means and displaying the time when the video signal is received when the video signal stored in the storage device is displayed. 13. The time-shift television apparatus according to claim 10, wherein time measuring means for measuring time information of receiving the input video signal, an output signal of the time measuring means, and a sector of the first storage means. When a second storage means for storing information and a control means for controlling the first and second storage means are provided and the video signal temporarily stored in the first storage means is displayed after an arbitrary time has passed, A first storage unit based on the time information stored in the second storage unit and the sector information stored in the first storage unit.
A time-shift television device, which is characterized by reading out a video signal from the storage device. 14. The time shift television device according to claim 13, wherein the video signal output from the first selecting means and the time information output from the second storing means are combined to display the time information. A time shift television apparatus characterized in that a synthesizing means for enabling the display means is provided and the time when the video signal to be displayed is received can be displayed. 15. The time-shift television apparatus according to claim 10, wherein a reduction means for selectively reducing the output signal of the first expansion means and the output signal of the second expansion means, and the first reduction means. There is provided selection means for selecting the output signal of the expansion means, the output signal of the second expansion means and the output signal of the reduction means and supplying them to the display means, and temporarily storing the video signal currently being received and delaying it. A time-shift television device, characterized in that the image signals are displayed on the same display screen. 16. A device for receiving and displaying a video signal having a compressed information amount, and demodulating means for demodulating the video signal into a baseband signal, and a video signal which can be displayed by expanding an output signal of the demodulating means. First decompression means for converting to
A compression unit that compresses the output signal of the first decompression unit by a compression method having a compression ratio higher than that of the input video signal, a first storage unit that stores the output signal of the compression unit, and the first storage unit. Second decompression means for decompressing the output signal of the storage means and converting it into a displayable video signal; and first selection means for switching the output signal of the first decompression means and the output signal of the second decompression means. A time-shift television apparatus comprising display means for displaying the output signal of the first selecting means, and temporarily storing the received video signal to display the video signal before an arbitrary time. 17. The time shift television apparatus according to claim 16, wherein the output signal of the demodulating means and the output signal of the compressing means are switched and supplied to the first storing means, Third selection means for switching between the output signal of the demodulation means and the output signal of the first storage device to supply to the first decompression means is provided, and is temporarily stored in the first storage means and then read out and displayed. A time-shift television device characterized in that a compression rate of a video signal can be selected. 18. The time-shift television apparatus according to claim 16, further comprising a time measuring means for measuring time information of receiving the input video signal, wherein the compressing means outputs an output signal of the first expanding means. A time-shift television apparatus, characterized in that, when the output signal of the clock means is combined and compressed to display the temporarily stored video signal, the time when the video signal is received is displayed. 19. The time-shift television apparatus according to claim 16, wherein time measuring means for measuring time information of receiving the input video signal, an output signal of the time measuring means, and a sector of the first storage means. Second storage means for storing information and control means for controlling the first and second storage means are provided, and the second storage means is provided when displaying the video signal temporarily stored in the first storage means. Time information stored in
A time-shift television device, wherein a video signal is read from the first storage device based on sector information of the storage device. 20. The time shift television device according to claim 19, wherein the time information displayed by combining the video signal output from the first selecting means and the time information output from the second storing means is displayed. A time shift television apparatus characterized in that a synthesizing means for enabling the display means is provided and the time when the video signal to be displayed is received can be displayed. 21. A time-shift television apparatus according to claim 16, wherein a reduction means for selectively reducing the output signal of the first expansion means and the output signal of the second expansion means, and the first reduction means. There is provided selection means for selecting the output signal of the expansion means, the output signal of the second expansion means and the output signal of the reduction means and supplying them to the display means, and temporarily storing the video signal currently being received and delaying it. A time-shift television device, characterized in that the image signals are displayed on the same display screen.