JPH11262009A - Device for reproducing video signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain reproduction concerning an encoding system, which is not a hierarchical type one by executing reproduction in accordance with reproduction channel information, which is added to a header in identifying data or a bit stream. SOLUTION: Data, demodulated by a transmission data demodulator 101, are analyzed by a demodulation data selector 102. When identifying data indicating that both bit streams with a low resolution and a high resolution are multiplexed and modulated are detected, a switch control signal indicating the separation of both is outputted. When data are only one bit stream, they are outputted to the side of the high resolution bit stream, and also the switch control signal indicating that is outputted. When the control signal indicating the separation is inputted, a switch 106 adds the output B of a high efficiency encode 103 to a signal C, through which the low resolution is converted into the high one, and a high resolution signal D is outputted. When the control signal indicates the output of only one video signal bit stream, the output of the first high efficiency encoder 103 is outputted as a video signal A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal reproducing apparatus.

[0002]

2. Description of the Related Art A conventional video signal reproducing apparatus will be described below with reference to FIG.

In FIG. 16, reference numeral 101 denotes a transmission data demodulator; 1201, a demodulated data selector; 103, a first high-efficiency decoder; 104, a second high-efficiency decoder; Is an adder.

The first transmission data demodulator 101 demodulates the input transmission data and outputs the demodulated data. The first demodulated data selector 1201 separates and extracts a low-resolution bit stream and a high-resolution bit stream from the demodulated data, and outputs each. First
The high-efficiency decoder 103 performs the first predetermined decoding on the input high-resolution bit stream and outputs the decoded signal.

[0005] The second high-efficiency encoder 104 decodes the input low-resolution bit stream into a second predetermined signal, and outputs the decoded signal. The resolution converter 105 outputs a resolution conversion signal obtained by converting the input low-resolution decoded signal to the same resolution as the high-resolution video signal. The adder 1202 adds the output of the first high-efficiency encoder 103 and the output of the resolution converter 105 one pixel at a time, and outputs a high-resolution video signal.

[0006]

The above-mentioned conventional video signal reproducing apparatus can reproduce a video signal coded by a hierarchical coding method, and at the same time, a video signal coded by a non-hierarchical coding method. However, it was not possible to reproduce the information, to perform adaptive error correction, or to reproduce the additional information or the additional area digital video signal.

[0007] An object of the present invention is to provide a video signal reproducing apparatus which solves such a problem.

[0008]

SUMMARY OF THE INVENTION The present invention can reproduce a non-hierarchical coded video signal by obtaining reproduction channel information from identification data in transmission data or a header in a bit stream. By using a resolution bit stream, adaptive error correction can be performed, and the above problem can be solved by adding a function of reproducing additional information and an additional area digital video signal from a predetermined position of reproduction data.

[0009]

(Embodiment 1) An embodiment of the first invention of the present invention will be described below with reference to FIG.

In FIG. 1, 101 is a first transmission data demodulator, 102 is a first demodulation data selector, 103 is a first high-efficiency decoder, 104 is a second high-efficiency decoder,
105 is a resolution converter and 106 is a switch.

[0011] The first transmission data demodulator 101 demodulates the input transmission data and outputs the demodulated data.

The first demodulated data selector 102 analyzes the header of the demodulated data, and determines whether the data of the channel to be decoded is a low-resolution bit stream in which the low-resolution video signal is encoded, and a high-resolution video signal. A high-resolution bit stream in which the differential signal of the low-resolution signal is encoded
If it is detected that identification data indicating that the data is multiplexed and modulated is recorded at a predetermined position in the header of the demodulated data, the low resolution bit stream and the high resolution bit stream are separated. And outputs a switch control signal indicating that the low-resolution bit stream and the high-resolution bit stream have been separated. If the data of the channel to be decoded is only one video signal bit stream, it indicates that the video signal bit stream is output to the high-resolution bit stream side and that only one video signal bit stream is output. Outputs switch control signal.

The first high-efficiency decoder 103 performs a first predetermined decoding on the input bit stream and outputs the decoded signal. The second high-efficiency encoder 104 performs a second predetermined decoding on the input bit stream and outputs the same, and outputs the decoded signal. Resolution converter 1
05 outputs a resolution-converted signal obtained by converting the input low-resolution decoded signal to the same resolution as the high-resolution video signal (C). When the switch control signal indicates that the low-resolution bit stream and the high-resolution bit stream are separated, the switch 106 outputs the output (B) of the first high-efficiency encoder 103 to the resolution converter 10.
5 is added one pixel at a time to output a high resolution video signal (D), and if the switch control signal indicates that only one video signal bit stream has been output, the first The output of the high-efficiency encoder 103 is output as it is as a video signal (A).

The first invention of the present application, by having the first demodulated data selector 102, decodes either a hierarchically-compressed video signal or a non-hierarchically-compressed video signal. can do. (Embodiment 2) An embodiment of the second invention of the present application will be described below with reference to FIG.

The description of FIG. 2 that is the same as that of FIG. 1 will be omitted.
In FIG. 2, reference numeral 201 denotes a second demodulated data selector.

The demodulated data selector 201 analyzes the header of the demodulated data as input, and determines whether the data of the channel to be decoded is a low-resolution bit stream in which the low-resolution video signal is encoded, a high-resolution video signal, When it is detected that identification data indicating that the differential signal of the resolution signal and the encoded high-resolution bit stream are multiplexed and modulated is recorded at a predetermined position in the header of the demodulated data. Separates the low-resolution bit stream and the high-resolution bit stream, outputs each, and outputs a switch control signal indicating that the low-resolution bit stream and the high-resolution bit stream have been separated. Further, the data of the channel to be decoded is only one video signal bit stream, and the video signal has a predetermined resolution (for example, horizontal 720 pixels, vertical 480 lines, frame rate 6).
0 Hz) or more, the demodulated data selector 201 outputs the video signal bit stream to the high-resolution bit stream side, outputs nothing to the low-resolution bit stream side, and outputs one video signal bit stream. A switch control signal indicating that only the stream has been output is output. If the data of the channel to be decoded is only one video signal bit stream and the video signal is smaller than a predetermined resolution, the demodulated data selector 2
01 outputs a switch control signal indicating that the video signal bit stream is output to the low resolution bit stream side, nothing is output to the high resolution bit stream side, and only one video signal bit stream is output. Output.

The first high-efficiency decoder 103 performs a first predetermined decoding on the input bit stream and outputs the decoded signal. The second high-efficiency encoder 104 performs a second predetermined decoding on the input bit stream and outputs the same, and outputs the decoded signal.

The resolution converter 105 converts the input low-resolution decoded signal into a high-resolution signal having the same resolution as the high-resolution signal, and outputs the high-resolution signal. When the switch control signal indicates that the low-resolution bit stream and the high-resolution bit stream have been separated, the switch 106 outputs the output of the first high-efficiency encoder 103 and the output of the resolution converter 105 one pixel at a time. When the switch control signal indicates that only one high-resolution bit stream has been output, the output of the first high-efficiency encoder 103 is directly used as the video signal. Output.

In other words, when there is only one high-resolution bit stream, a high-resolution signal is output from the switch 106 and there is no output from the second high-efficiency decoder 104, and when there is only one low-resolution bit stream, , No output from the switch 106, and a low-resolution signal is output from the second high-efficiency decoder 104.

According to the second aspect of the present invention, by having the second demodulated data selector 201, it is possible to decode a video signal which has been subjected to hierarchical compression encoding and a video signal which has been subjected to non-hierarchical compression encoding. it can. (Embodiment 3) An embodiment of the third invention of the present application will be described below with reference to FIG.

The description of FIG. 3 that is the same as that of FIG. 1 will be omitted.
In FIG. 3, reference numeral 301 denotes a second transmission data demodulator;
2 is a third demodulated data selector. The second transmission data demodulator 301 converts the data of the reception channel in the input transmission data into a low-resolution bit stream in which a low-resolution video signal is encoded and a differential signal between the high-resolution video signal and the low-resolution signal. If it is detected that identification data indicating that the multiplexed and high-resolution bit stream is multiplexed and modulated is transmitted to a predetermined position in the transmission data, the low-resolution bit stream and the high-resolution A switch control signal indicating that the bit stream is separated is output. If the identification data indicating that the data is multiplexed is not transmitted, a switch control signal indicating that the image data is one video signal bit stream is output;
It demodulates input transmission data and outputs demodulated data.

The third demodulated data selector 302 outputs the low-resolution bit stream when the signal from the second transmission data demodulator 301 indicates that the low-resolution bit stream and the high-resolution bit stream are separated. And a high-resolution bit stream, output each
If the signal from the transmission data demodulator 301 indicates that there is only one video signal bit stream, the video signal bit stream is converted to the first high-efficiency decoder 103.
, And no output is made to the second high-efficiency decoder 104 side. The first high-efficiency decoder 103 performs a first predetermined decoding on the input bit stream and outputs a decoded signal.

The second high-efficiency encoder 104 performs a second predetermined decoding on the input bit stream and outputs it, and outputs the decoded signal. The resolution converter 105 converts the input low-resolution decoded signal into a high-resolution signal having the same resolution as the high-resolution signal, and outputs the high-resolution signal.

When the switch control signal indicates that the low-resolution bit stream and the high-resolution bit stream have been separated, the switch 106 outputs the output of the first high-efficiency encoder 103 and the output of the resolution converter 105. If a high-resolution video signal is output by adding one pixel at a time, and the switch control signal indicates that only one video signal bit stream has been output, the output of the second high-efficiency encoder 103 is used as it is. Output as a video signal.

According to the third invention of the present application, by having the second transmission data demodulator 301 and the third decoded data selector 302, even a video signal which has been subjected to hierarchical compression encoding can perform non-hierarchical compression encoding. The decoded video signal can also be decoded.

(Embodiment 4) An embodiment of the fourth invention of the present application will be described below with reference to FIG.

The description of FIG. 4 that is the same as that of FIGS. 1 and 2 will be omitted. In FIG. 4, reference numeral 402 denotes a fourth demodulated data selector.

The second transmission data demodulator 301 converts the data of the reception channel in the input transmission data into a low-resolution bit stream in which a low-resolution video signal is encoded, a high-resolution video signal and a low-resolution signal. If it is detected that the identification data indicating that the differential signal is multiplexed and modulated with the encoded high-resolution bit stream is transmitted to a predetermined position in the transmission data, the low-resolution bit is transmitted. A switch control signal indicating that a stream and a high-resolution bit stream are separated is output. If not transmitted, a switch control signal indicating that one video signal bit stream is separated is output. Demodulates the data and outputs demodulated data.

If the signal from the second transmission data demodulator 301 indicates that the low-resolution bit stream and the high-resolution bit stream are to be separated, the fourth demodulated data selector 402 Separate high-resolution bitstreams and output each. On the other hand, if the signal from the fourth transmission data demodulator 301 indicates that only one video signal bit stream is to be separated, the video signal bit stream is separated, its header is analyzed, and the video signal bit stream is analyzed. Is higher than a predetermined resolution (for example, horizontal 720 pixels, vertical 480 lines, frame rate 60 Hz), the video signal bit stream is output to the high resolution bit stream side, and nothing is output to the low resolution bit stream side. If the video signal is lower than the predetermined resolution, the video signal bit stream is output to the low-resolution bit stream, and nothing is output to the high-resolution bit stream.

The first high-efficiency decoder 103 performs a first predetermined decoding on the input bit stream and outputs a decoded signal. The second high-efficiency encoder 104 performs a second predetermined decoding on the input bit stream and outputs the same, and outputs the decoded signal. Resolution converter 1
Reference numeral 05 converts the input low-resolution decoded signal into a high-resolution signal having the same resolution as the high-resolution signal, and outputs the converted signal.

When the switch control signal indicates that the low-resolution bit stream and the high-resolution bit stream have been separated, the switch 106 outputs the output of the first high-efficiency encoder 103 and the output of the resolution converter 105. If a high-resolution video signal is output by adding one pixel at a time, and the switch control signal indicates that only one video signal bit stream has been output, the output of the second high-efficiency encoder 103 is used as it is. Output as a video signal.

According to the fourth invention of the present application, by having the fourth decoded data selector 402, it is possible to decode a video signal which has been subjected to hierarchical compression encoding and a video signal which has been subjected to non-hierarchical compression encoding. Can be.

(Embodiment 5) An embodiment of the fifth invention of the present application will be described below with reference to FIG. In FIG. 5, the same components as those in FIG. 1 will not be described. In FIG. 5, reference numeral 501 denotes a first high-efficiency decoder, and 502 denotes a second switch.

The first high-efficiency decoder 501 performs a third predetermined decoding on the input high-resolution bit stream,
The decoded signal is output. In this decoding, if the switch control signal indicates that the low-resolution bit stream and the high-resolution bit stream have been separated, the first high-efficiency decoding is performed if an error is detected in the high-resolution bit stream. The decoder 501 continues to output the error correction signal until decoding can be performed normally, and also detects a portion where the error has propagated, and outputs the error correction signal.

The second high-efficiency encoder 104 performs a second predetermined decoding on the input low-resolution bit stream and outputs the same, and outputs the decoded signal. The resolution converter 105 converts the input low-resolution decoded signal into a high-resolution signal and outputs it.

The second switch 502 has a two-stage configuration of switches 5021 and 5022. The switch control signal indicates that a low-resolution bit stream and a high-resolution bit stream have been separated, and an error correction signal is output. If not, the output of the first high-efficiency encoder 501 and the output of the resolution converter 105 are added one pixel at a time to output a high-resolution video signal. , And outputs the output of the resolution converter 105 as it is. If the switch control signal indicates that only one video signal bit stream has been output, the first high-efficiency encoder 5
01 is output as a video signal as it is.

The fifth invention of the present application has a first high-efficiency decoder 501 and a second switch 502,
When an error occurs in the high-resolution bit stream, the error location and the error propagation location can be modified by resolution-converted signals of the low-resolution bit stream. (Embodiment 6) An embodiment of the sixth invention of the present application will be described below with reference to FIG.

In FIG. 6, the same components as those in FIG. 1 are not described.
In FIG. 6, reference numeral 601 denotes a fourth high-efficiency decoder.

The first high-efficiency decoder 601 performs a fourth predetermined decoding on the input high-resolution bit stream,
The decoded signal is output.

At the time of decoding, if the switch control signal indicates that the low-resolution bit stream and the high-resolution bit stream have been separated, if an error is detected in the high-resolution bit stream, the first
The high-efficiency decoder 601 has a predetermined level (intermediate level of the accuracy of the signal. For example,
If the signal is 8-bit precision, continue to output 128) signal,
In addition, a portion where the error has propagated is also detected, and a signal of a predetermined level is output. The second high-efficiency encoder 104 performs a second predetermined decoding on the input low-resolution bit stream and outputs the decoded signal, and outputs the decoded signal. The resolution converter 105 converts the input low-resolution decoded signal into a high-resolution signal and outputs it.

When the switch control signal indicates that the low-resolution bit stream and the high-resolution bit stream have been separated, the switch 106 changes the output of the first high-efficiency encoder 601 and the output of the resolution converter 105. If a pixel signal is added one pixel at a time to output a high-resolution video signal, and if the switch control signal indicates that only one video signal bit stream has been output, the output of the first high-efficiency encoder 601 is output. Is output as a video signal as it is.

According to the sixth aspect of the present invention, when an error occurs in a high-resolution bit stream, an error location and an error propagation location are converted to a low-resolution bit stream by having the first high-efficiency decoder 601. The decoded signal is obtained by converting the resolution, and can be modified. (Embodiment 7) An embodiment of the seventh invention of the present application will be described below with reference to FIG. In FIG. 7, the same components as those in FIG. 1 will not be described. In FIG. 7, reference numeral 701 denotes a first high-efficiency decoder, and 702 denotes a second high-efficiency decoder.

The first high-efficiency decoder 701 performs a fifth predetermined decoding on the input high-resolution bit stream,
The decoded signal is output. At the time of this decoding, if the switch control signal indicates that the low-resolution bit stream and the high-resolution bit stream have been separated, and if an error is detected in the high-resolution bit stream, the first high-efficiency decoder 701 Until decoding can be performed normally, the coded information (such as motion vectors) of the low-resolution bit stream around the error location on the screen in the reproduced video signal is obtained from the second high-efficiency decoder 702. Then, error correction is performed using the encoded information.

The sixth high-efficiency encoder 702 decodes the input high-resolution bit stream into a sixth predetermined output, outputs the decoded signal, and outputs the decoded signal to the first high-efficiency decoder. From 701, encoded information necessary for obtaining encoded information is output. The resolution converter 105 converts the input low-resolution decoded signal into a high-resolution signal and outputs it.

When the switch control signal indicates that the low-resolution bit stream and the high-resolution bit stream have been separated, the switch 106 outputs the output of the first high-efficiency encoder 701 and the output of the resolution converter 105. When a high-resolution video signal is output by adding one pixel at a time, and the switch control signal indicates that only one video signal bit stream has been output, the output of the first high-efficiency encoder 701 is used as it is. Output as a video signal.

The seventh invention of the present application has a first high-efficiency decoder 701 and a second high-efficiency decoder 702, so that when an error occurs in a high-resolution bit stream, an error location is determined. By obtaining the coded information from the low-resolution bit stream, highly accurate retouching can be performed.

Embodiment 8 Hereinafter, an eighth embodiment of the present invention will be described with reference to FIGS.

In FIG. 8, reference numeral 801 denotes a recording medium;
02 is a reproducer, 803 is an additional information reproducer, 804 is a high-efficiency decoder, 805 is a video signal reproducer. In FIG. 12, 2701 is a video signal divider, 2702 is an additional information generator, and 2703 is a video A signal converter, 2704 is a high-efficiency encoder, 2705 is a data replacer, and 2706 is a recorder.

First, a recording medium reproduced by the eighth invention of the present application will be described with reference to FIG. FIG. 12 shows a video signal recording apparatus for recording a recording medium to be reproduced by the eighth invention of the present application. The image divider 2701 receives the input first
Is divided into a second digital video signal as an effective area and a digital video signal outside the effective area, and a second digital video signal is output.

An additional information generator 2702 generates additional information data. The video signal converter 2703 adds a dummy signal to the second digital video signal and converts it into a third digital video signal.

The high-efficiency encoder 2704 performs predetermined high-efficiency encoding of the third digital video signal to create and output compressed data.

The data replacing unit 2705 replaces data at a position corresponding to the information of the dummy signal in the compressed data with the additional information data.

The recording unit 2706 is provided with the data replacing unit 270.
5 is replaced with a predetermined recording medium 801.
To record.

Next, an eighth invention of the present application will be described with reference to FIG. The reproducer 802 reproduces the compressed bit stream recorded on the recording medium 801 and outputs the high-efficiency decoder 8
04 and outputs the additional information data recorded at a predetermined position in the compressed bit stream to the additional information reproducer 80.
Output to 3.

An additional information reproducer 803 reproduces and outputs an additional information signal from the additional information data. High efficiency decoder 8
A decoding unit 04 decodes the compressed bit stream, which is an inverse transform of predetermined high-efficiency coding, and outputs a video signal. The video signal reproducer 805 outputs a reproduced video signal in which the video signal output from the high-efficiency decoder 804 is rearranged.

According to the eighth aspect of the present invention, the provision of the reproducer 802 and the additional information reproducer 803 makes it possible to reproduce the additional information recorded at a predetermined position in the compressed bit stream. (Embodiment 9) An embodiment of the ninth invention of the present application will be described below with reference to FIGS. In FIG. 9, the same components as those in FIG. 8 are not described. In FIG. 9, reference numeral 901 denotes a regenerator;
02 is a video signal adder. In FIG. 13, the same components as those in FIG. 12 will not be described. In FIG. 13, reference numeral 2707 denotes a data replacement unit. First, a recording medium to be reproduced by the ninth invention of the present application will be described with reference to FIG.

FIG. 13 shows a video signal recording apparatus for recording a recording medium reproduced by the ninth invention of the present application. The video divider 2701 divides the input first digital video signal into a second digital video signal as an effective area and a digital video signal outside the effective area, and outputs a second digital video signal. The video signal converter 2703 adds a dummy signal to the second digital video signal and converts it into a third digital video signal. The high efficiency encoder 2704 is the third
Of the digital video signal is subjected to predetermined high-efficiency encoding to generate and output compressed data.

The data replacer 2705 replaces data at a position corresponding to the information of the dummy signal in the compressed data with digital video signal data selected from digital video signals other than the effective area in the first digital video signal. I do. The recording device 2706 records the compressed data replaced by the data replacement device 2705 on a predetermined recording medium 801.

Next, the ninth invention of the present application will be described with reference to FIG.

The reproducing device 901 reproduces the compressed bit stream recorded on the recording medium 801 and outputs the reproduced signal to the high-efficiency decoder 804. The reproducing device 901 also reproduces the compressed bit stream other than the effective area recorded at a predetermined position in the compressed bit stream. A digital video signal selected from the digital video signals is output. The high-efficiency decoder 804 decodes the compressed bit stream, which is the inverse transform of predetermined high-efficiency coding, and outputs a video signal.

The video signal reproducer 805 is a high-efficiency decoder 8
A reproduced video signal obtained by rearranging the video signal output from the output unit 04 is output.

The video signal adder 902 is the video signal reproducer 8
The digital video signal output from the reproducer 901 is added to a predetermined position of the reproduced video signal output from the output unit 05 to output a reproduced video signal.

According to the ninth aspect of the present invention, the video signal to which the digital video signal is added can be reproduced at a predetermined position in the compressed bit stream by including the reproducing device 901 and the video signal adding device 902.

(Embodiment 10) Embodiment 10 of the present invention will be described below with reference to FIGS.

In FIG. 10, the same components as those in FIG. 8 are not described. In FIG. 10, reference numeral 1001 denotes a high-efficiency decoder. 14, the description of the same components as those in FIG. 12 is omitted. In FIG. 14, reference numeral 2708 denotes a high efficiency encoder.

First, a recording medium reproduced by the tenth invention of the present application will be described with reference to FIG. FIG. 14 shows a video signal recording apparatus for recording a recording medium to be reproduced by the tenth invention of the present application. The video divider 2701 divides the input first digital video signal into a second digital video signal as an effective area and a digital video signal outside the effective area, and outputs a second digital video signal. Additional information generator 2702 generates additional information data. The video signal converter 2703 adds a dummy signal to the second digital video signal and converts it into a third digital video signal.

The high-efficiency encoder 2704 performs predetermined first high-efficiency encoding of the third digital video signal to create and output compressed data. The high efficiency encoder 2708 performs predetermined second high efficiency coding on the additional information data generated by the additional information generator 2702 to create and output additional information compressed data. The data replacement unit 2705 replaces the data at the position corresponding to the information of the dummy signal in the compressed data with the additional information compressed data output from the high efficiency encoder 2708. The recording device 2706 records the compressed data replaced by the data replacement device 2705 on a predetermined recording medium 801.

Next, the tenth invention of the present application will be described with reference to FIG.

The reproducing device 802 reproduces the compressed bit stream recorded on the recording medium 801 and outputs it to the high-efficiency decoder 804. The reproducing device 802 also outputs the compressed additional information data recorded at a predetermined position in the compressed bit stream. Output to the high-efficiency decoder 1001.

The high-efficiency decoder 1001 decodes the additional information compressed data, which is the inverse transform of the predetermined second high-efficiency encoding, and reproduces and outputs the additional information signal. The high-efficiency decoder 804 decodes the compressed bit stream, which is the inverse of the first high-efficiency encoding, and outputs a video signal. The video signal reproducer 805 outputs a reproduced video signal in which the video signal output from the high-efficiency decoder 804 is rearranged.

The tenth invention of the present application is a high-efficiency decoder 10
By having 01, it is possible to reproduce the additional information compressed and recorded by the predetermined compression at a predetermined position in the compressed bit stream. Embodiment 11 Hereinafter, an eleventh embodiment of the present invention will be described with reference to FIGS.

In FIG. 15, the description of the same components as those in FIG. 12 is omitted. In FIG. 15, reference numeral 2709 denotes a high efficiency encoder. In FIG. 11, the same components as those in FIGS. 8 and 9 will not be described.
In FIG. 11, reference numeral 1101 denotes a high-efficiency decoder;
Is a video signal adder.

First, a recording medium reproduced by the eleventh invention of the present application will be described with reference to FIG. FIG. 15 shows a video signal recording device for recording a recording medium reproduced by the eleventh invention of the present application. The video divider 2701 divides the input first digital video signal into a second digital video signal as an effective area and a digital video signal outside the effective area, and outputs a second digital video signal. The video signal converter 2703 adds a dummy signal to the second digital video signal and converts it into a third digital video signal. The high-efficiency encoder 2704 generates the compressed data by performing the first high-efficiency encoding on the third digital video signal, and outputs the compressed data.

The high-efficiency encoder 2709 encodes digital video signal data selected from digital video signals other than the effective area in the first digital video signal in a predetermined second high-efficiency manner and performs second compression. Create and output data.

The data replacement unit 2705 replaces the data at the position corresponding to the information of the dummy signal in the compressed data with the second compressed data which is the output of the high efficiency encoder 2708. The recording device 2706 is provided with the data replacement device 2705.
Is recorded on a predetermined recording medium 801.

Next, the eleventh invention of the present application will be described with reference to FIG. The reproducer 901 reproduces the compressed bit stream recorded on the recording medium 801 and outputs the reproduced bit stream to the high-efficiency decoder 804, and outputs the second compressed data recorded at a predetermined position in the compressed bit stream to a high efficiency. Output to the decoder 1101.

The high-efficiency decoder 1101 decodes the second compressed data, which is the inverse transform of the predetermined second high-efficiency encoding, to obtain a digital image other than the effective area in the first digital video signal. The digital video signal selected from the signals is reproduced and output.

The high-efficiency decoder 804 decodes the compressed bit stream, which is the inverse transform of the first high-efficiency encoding, and outputs a video signal. Video signal reproducer 80
Reference numeral 5 outputs a reproduced video signal in which the video signal output from the high-efficiency decoder 804 is rearranged.

The video signal adder 902 is the video signal reproducer 8
The digital video signal data selected from the digital video signals other than the effective area in the first digital video signal is added to a predetermined position of the reproduced video signal which is the output of 05, and the reproduced video signal is output.

The eleventh invention of the present application provides a high-efficiency decoder 11
01 and the video signal adder 1102,
A video signal in which an additional area digital video signal compressed and recorded by predetermined compression and added at a predetermined position in a compressed bit stream can be reproduced.

[0081]

According to the present invention, it is possible to reproduce a video signal which is not hierarchically coded and to perform adaptive error correction.

Further, according to the present invention, resolution conversion with high conversion efficiency can be performed, and the reproduction quality of a high-resolution video signal can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of a video signal reproducing apparatus according to a first invention of the present application.

FIG. 2 is a block diagram of a video signal reproducing device according to a second invention of the present application.

FIG. 3 is a block diagram of a video signal reproducing apparatus according to a third invention of the present application.

FIG. 4 is a block diagram of a video signal reproducing apparatus according to a fourth invention of the present application.

FIG. 5 is a block diagram of a video signal reproducing device according to a fifth invention of the present application.

FIG. 6 is a block diagram of a video signal reproducing device according to a sixth invention of the present application.

FIG. 7 is a block diagram of a video signal reproducing apparatus according to a seventh invention of the present application.

FIG. 8 is a block diagram of a video signal reproducing apparatus according to an eighth aspect of the present invention.

FIG. 9 is a block diagram of a video signal reproducing apparatus according to a ninth invention of the present application.

FIG. 10 is a block diagram of a video signal reproducing apparatus according to a tenth aspect of the present invention.

FIG. 11 is a block diagram of a video signal reproducing apparatus according to an eleventh invention of the present application.

FIG. 12 is a block diagram of a video signal recording device corresponding to the video signal reproducing device according to the eighth invention of the present application.

FIG. 13 is a block diagram of a video signal recording device corresponding to the video signal reproducing device according to the ninth invention of the present application.

FIG. 14 is a block diagram of a video signal recording device corresponding to the video signal reproducing device according to the tenth aspect of the present invention.

FIG. 15 is a block diagram of a video signal recording device corresponding to the video signal reproducing device of the eleventh invention of the present application.

FIG. 16 is a block diagram of a conventional video signal reproducing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 Transmission data demodulator 102 Demodulated data selector 103 High-efficiency decoder 105 Resolution converter 106 Switch 801 Recording medium 802 Reproducer 803 Additional information reproducer 805 Video signal reproducer 902 Video signal adder 1202 Adder

Claims (11)

[Claims] 1. A video signal reproducing apparatus for decoding and reproducing a video signal hierarchized and encoded in a spatial axis direction, wherein the first transmission data demodulates input transmission data and outputs demodulated data. A demodulator, when decoding a header in the data of the reception channel in the demodulated data, a low-resolution bit stream in which the low-resolution video signal is encoded, and a differential signal between the high-resolution video signal and the low-resolution signal. When the identification data indicating that the coded high-resolution bit stream is multiplexed and modulated is recorded at a predetermined position in the header, the low-resolution bit stream and the high-resolution bit A switch control that separates the streams, outputs each, and indicates that the low- and high-resolution bitstreams have been separated. A roll signal is output, and when there is only one video signal bit stream, the video signal bit stream is output to the first high-efficiency decoder side, and is output to the second high-efficiency decoder side. And a first demodulation data selector that outputs a switch control signal indicating that only one video signal bit stream has been output, and a second demodulation data selector that decodes the high-resolution bit stream or the video signal bit stream. 1 high-efficiency decoder, a second high-efficiency decoder for decoding the low-resolution bit stream, and a low-resolution video signal decoded by the second high-efficiency decoder. A resolution converter for converting the video signal into a high-resolution signal having the same resolution as the video signal; If it indicates that the frames have been separated, the output of the first high-efficiency encoder and the output of the resolution converter are added for each pixel, and a high-resolution video signal is output. A switch that outputs the output of the first high-efficiency encoder as a video signal as it is, when the switch control signal indicates that only the video signal bit stream has been output; A video signal reproducing device characterized by the following. 2. A video signal reproducing apparatus for decoding and reproducing a video signal hierarchized and encoded in a spatial axis direction, wherein the first transmission data demodulates input transmission data and outputs demodulated data. A demodulator, when decoding a header in the data of the reception channel in the demodulated data, a low-resolution bit stream in which the low-resolution video signal is encoded, and a differential signal between the high-resolution video signal and the low-resolution signal. If the identification data indicating that the encoded high-resolution bit stream is multiplexed and modulated is recorded at a predetermined position in the header, the low-resolution bit stream and the high-resolution bit stream are recorded. Switch controller that outputs a low-resolution bit stream and a high-resolution bit stream. A video signal bit stream, and if the video signal is a high resolution having a resolution equal to or higher than a predetermined resolution, the video signal bit stream is subjected to a first high-efficiency decoding. And outputs a switch control signal indicating that only one video signal bit stream has been output, and outputs a switch control signal indicating that only one video signal bit stream has been output to the second high-efficiency decoder. If there is only a video signal bit stream and the video signal is of a low resolution having a resolution equal to or less than a predetermined resolution, the video signal bit stream is output to the second high-efficiency decoder side, No demodulation is performed on the high-efficiency decoder side, and the second demodulation outputs a switch control signal indicating that only one video signal bit stream has been output. A data selector, a first high-efficiency decoder for decoding the high-resolution bit stream or the video signal bit stream, and a second high-efficiency decoder for decoding the low-resolution bit stream or the video signal bit stream A decoder, a resolution converter for converting the low-resolution video signal decoded by the second high-efficiency decoder into a high-resolution video signal having the same resolution as the high-resolution video signal, and If it indicates that the resolution bit stream and the high resolution bit stream have been separated, the output of the first high-efficiency encoder and the output of the resolution converter are added for each pixel, and A resolution video signal is output, and the switch control signal indicates that only one video signal bit stream has been output. Case, the a switch first output of the high-efficiency encoder outputs it as a high resolution video signal, the video signal reproducing apparatus characterized by comprising. 3. A video signal reproducing apparatus for decoding and reproducing a video signal hierarchized and encoded in a spatial axis direction, wherein data of a reception channel in transmission data as input is:
Identification data indicating that a low-resolution bit stream obtained by encoding a low-resolution video signal and a high-resolution bit stream obtained by encoding a difference signal between a high-resolution video signal and a low-resolution signal are multiplexed and modulated. Outputs a switch control signal indicating that a low-resolution bit stream and a high-resolution bit stream are separated when transmitted at a predetermined position in transmission data, and outputs one switch control signal when not transmitted. A second transmission data demodulator that outputs a switch control signal indicating that a video signal bit stream is separated, demodulates input transmission data and outputs demodulated data, and a signal from the transmission data demodulator, When indicating that the low-resolution bit stream and the high-resolution bit stream are separated, the low-resolution bit stream is used. Separating said high resolution bit stream and stream, and outputs, respectively,
When the signal from the transmission data demodulator indicates that there is only one video signal bit stream, the video signal bit stream is output to the first high-efficiency decoder side, and is output to the second high-efficiency decoder. A third demodulation data selector that does not output to the efficiency decoder side, a first high efficiency decoder that decodes the high resolution bit stream or the video signal bit stream, and the low resolution bit A second high-efficiency decoder for decoding the stream; and a resolution for converting the low-resolution video signal decoded by the second high-efficiency decoder into a high-resolution video signal having the same resolution as the high-resolution video signal. A first high-efficiency encoding, if the switch control signal is indicative of separating a low-resolution bit stream from a high-resolution bit stream. If the output of the device and the output of the resolution converter are added for each pixel to output a high-resolution video signal, and the switch control signal indicates that only a video signal bit stream is output, A switch for directly outputting the output of the first high-efficiency encoder as a video signal. 4. A video signal reproducing apparatus for decoding and reproducing a video signal hierarchized and encoded in a spatial axis direction, wherein data of a reception channel in transmission data as input is:
Identification data indicating that the low-resolution bit stream in which the low-resolution video signal is encoded and the high-resolution bit stream in which the difference signal between the high-resolution video signal and the low-resolution signal is encoded are multiplexed and modulated. However, if it is transmitted to a predetermined position in the transmission data, it outputs a switch control signal indicating that the low-resolution bit stream and the high-resolution bit stream are separated, and such identification data is transmitted. If not, a second transmission data demodulator that outputs a switch control signal indicating that one video signal bit stream is separated, demodulates input transmission data and outputs demodulated data, Indicates that the signal from the data demodulator separates the low and high resolution bit streams. Case, the separating said high resolution bit stream and the low resolution bit stream, and outputs, respectively,
When the signal from the transmission data demodulator indicates that only one video signal bit stream is separated,
When the video signal bit stream is separated and its header is decoded, if the resolution of the video signal is higher than or equal to a predetermined resolution, the video signal bit stream is output to the first high-efficiency decoder side, and the second No output is performed on the high-efficiency decoder side, and when the resolution of the video signal is lower than a predetermined resolution when the header is decoded, it is output to the second high-efficiency decoder side, A fourth demodulated data selector that does not output to the first high-efficiency decoder side, a first high-efficiency decoder that decodes the high-resolution bit stream, and the low-resolution bit stream A high-efficiency decoder for decoding the low-resolution video signal decoded by the second high-efficiency decoder into a high-resolution picture signal having the same resolution as the high-resolution video signal. A converter and the switch When the switch control signal indicates that the low-resolution bit stream and the high-resolution bit stream are separated, the output of the first high-efficiency encoder and the output of the resolution converter are output for each pixel. To output a high-resolution video signal, and if the switch control signal indicates that only a video signal bit stream has been output, the output of the first high-efficiency encoder is directly used as a video signal. A video signal reproducing device, comprising: a switch that outputs a signal. 5. When an error is detected in a high-resolution bit stream when the switch control signal indicates that a low-resolution bit stream and a high-resolution bit stream are separated, an error occurrence location is determined. 5. The method according to claim 1, wherein the error correction signal is sent to the switch and the switch receiving the error correction signal continues to output the output of the resolution converter until decoding is normally performed. The video signal reproducing device according to any one of the above. 6. When an error is detected in a high-resolution bit stream when the switch control signal indicates that a low-resolution bit stream is separated from a high-resolution bit stream, an error occurrence location is determined. The first high-efficiency decoder has a function of continuously outputting a signal of a predetermined level as a high-resolution video signal until normal decoding is started. 5. The video signal reproducing device according to any one of 1 to 4. 7. When the switch control signal indicates that a low-resolution bit stream and a high-resolution bit stream are separated, and when an error is found in the high-resolution bit stream, an error occurrence location is determined. From the first high efficiency decoder to the error correction using information of the low resolution bit stream existing in the second high efficiency decoder until the decoding is normally performed.
5. The video signal reproducing apparatus according to claim 1, wherein the high-efficiency encoder includes: 8. A video signal dividing means for dividing the first digital video signal into a second digital video signal as an effective area and a digital video signal outside the effective area, and additional information generating means for generating additional information. Video signal converting means for adding a dummy signal to the second digital video signal to convert the second digital video signal into a third digital video signal, and generating the compressed data by encoding the third digital video signal at a predetermined high efficiency. Compression means; data replacement means for replacing data at a predetermined position in the compressed data with the additional information; and recording means for recording the compressed data replaced by the data replacement means on a predetermined recording medium. A video signal reproducing device for reproducing a recording medium recorded by a video signal recording device, comprising: reproducing means for reproducing compressed data recorded on the recording medium; Additional information reproducing means for extracting additional information recorded at a predetermined position in the compressed data; decoding means for decoding the compressed data to output a digital video signal; and A video signal reproducing device, comprising: digital video signal reproducing means for rearranging and extracting digital video signals. 9. A video signal dividing means for dividing the first digital video signal into a second digital video signal as an effective area and a digital video signal outside the effective area, and a dummy signal as the second digital video signal. Video signal conversion means for converting the third digital video signal into a third digital video signal by a predetermined high efficiency coding to generate compressed data; Data replacement means for replacing position data with a digital video signal in an additional area which is a digital video signal in a part other than the effective area; and recording means for recording the compressed data replaced by the data replacement means on a predetermined recording medium A video signal reproducing apparatus for reproducing a recording medium recorded by a video signal recording apparatus, comprising: reproducing compressed data recorded on the recording medium. An additional area digital video signal reproducing means for extracting a digital video signal of the additional area recorded at a predetermined position in the compressed data; and a reverse conversion of the high efficiency encoding of the compressed data. Decoding means for performing decoding to output a digital video signal; digital video signal reproducing means for rearranging and extracting the second digital video signal from the digital video signal; digital video signal in the additional area; 2. A video signal reproducing device, comprising: digital video signal rearranging means for rearranging the two digital video signals to reproduce the first digital video signal. 10. A video signal dividing means for dividing a first digital video signal into a second digital video signal as an effective area and a digital video signal outside the effective area, and additional information generating means for generating additional information. An additional information compression unit for generating first compressed data by encoding the additional information generated by the additional information generation unit at a predetermined first high efficiency; and adding a dummy signal to the second digital video signal. Video signal converting means for converting the third digital video signal into a second digital data signal by a predetermined second high-efficiency encoding to generate second compressed data; Data replacement means for replacing data at a predetermined position in the compressed data with the first compressed data, and recording means for recording the second compressed data replaced by the data replacement means on a predetermined recording medium. A video signal reproducing apparatus for reproducing a recording medium recorded by the video signal recording apparatus, comprising: reproducing means for reproducing compressed data recorded on the recording medium; and recording means for reproducing the compressed data recorded at a predetermined position in the compressed data. Additional data reproducing means for extracting the first compressed data, additional information decoding means for decoding the first compressed data as inverse transform of predetermined first high-efficiency encoding and outputting additional information Decoding means for decoding the compressed data, which is an inverse transform of predetermined second high-efficiency coding, to output a digital video signal; and rearranging a second digital video signal from the digital video signal. And a digital video signal reproducing means for extracting the video signal. 11. A video signal dividing means for dividing a first digital video signal into a second digital video signal as an effective area and a digital video signal outside the effective area, and a digital video signal in a part other than the effective area. Compression means for encoding the digital video signal in the additional area, which is a predetermined high-efficiency code, to generate first compressed data; and adding a dummy signal to the second digital video signal to produce a third digital video signal. Video signal converting means for converting the third digital video signal into a predetermined signal, and second predetermined high-efficiency encoding of the third digital video signal to generate second compressed data; Data replacement means for replacing position data with the first compressed data; and second data replaced by the data replacement means.
And a recording means for recording the compressed data on a predetermined recording medium. A video signal reproducing apparatus for reproducing the recording medium recorded by the video signal recording apparatus, wherein the compressed data recorded on the recording medium is reproduced Reproducing means, additional area compressed data reproducing means for extracting data at a predetermined position in the compressed data as compressed data of an additional area, and inverse conversion of predetermined first high-efficiency encoding of the compressed data of the additional area. An additional area digital video signal decoding means for performing a certain decoding to output a digital video signal of an additional area, and a digital signal which is obtained by performing a decoding which is an inverse transform of a predetermined second high efficiency coding on the compressed data. Decoding means for outputting a digital video signal of a predetermined effective area from the digital signal; and The digital video signal rearranged digital video signal of the effective region and the digital video signal reordering means for reproducing a digital video signal, a video signal reproducing apparatus characterized by comprising.