JPH10174122A - Video signal transmission method and apparatus, video signal encoding method and apparatus, and video signal decoding apparatus - Google Patents

Abstract

(57) [Problem] To reduce image quality deterioration of a color difference signal of a progressive scanning signal when performing high-efficiency encoding or high-efficiency decoding. SOLUTION: A conversion controller 107 selects a converter A103 or a converter B104, and converts a 844 signal which is a progressive scanning signal input from an input terminal 101 into a 420p signal at which a color difference signal has a desired sample position. Then, the color difference information relating to the sample position of the color difference signal obtained by the selected converter A103 or converter B104 is output to the color difference information recorder 106. The color difference information recorder 106 multiplexes color difference information with the converted signal and outputs the multiplexed signal. Conversion controller 10
By multiplexing the color difference information from 7 with the color difference information recorder 106, it becomes possible to transmit a plurality of types of signals on the same transmission path. In addition, when the transmitted signal is encoded with high efficiency, appropriate conversion can be performed on the color difference signal based on the color difference information, and unnecessary deterioration is not given.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal transmission method and apparatus for transmitting a progressive scanning signal, a video signal encoding method and apparatus for performing high-efficiency encoding, and a video signal decoding for performing high-efficiency decoding. It relates to a device.

[0002]

2. Description of the Related Art As standards for 4: 2: 0p signals (hereinafter referred to as "420p signals") which are progressive scanning signals, there are SMPTE294M as a transmission standard and MPEG as a compression standard.
Both standards handle 420p signals, but the 420p signals handled are not exactly the same, and the sample positions of the color difference signals with respect to the luminance signals are different. FIG. 9 shows S
MPp is transmitted to the 420p signal transmitted by MPTE294M.
FIG. 901 is a block diagram of a conventional video signal encoding device for applying EG compression, and reference numeral 901 denotes a 420p of SMPTE294M.
An input terminal for inputting a signal, 902 is a SMPTE294M
A converter 903 that converts the phase and the number of samples of the color difference signal of the standard signal is a converter B 904 that converts the phase and the number of samples of the color difference signal into a signal of the MPEG standard.
This is a high-efficiency encoder that compresses a 20p signal according to the MPEG standard.

[0003] SMPTE input from an input terminal 901
The 294M 420p signal is converted by a converter A902 into a 420p signal.
The p signal is up-converted into an 8: 4: 4 signal (hereinafter referred to as “844 signal”). The up-converted 844 signal was converted by a converter B 903 into a 420p signal having a phase of a color difference signal conforming to the MPEG standard, and MPEG-compressed by a high-efficiency encoder 904.

[0004]

As described above, the transmission standard SMPTE294M and the compression standard MPEG are:
Since the 420p signals to be handled are not exactly the same and the sample positions of the color difference signals with respect to the luminance signals are different, the conventional video signal encoding apparatus up-converts the 420p signals transmitted by SMPTE294M to 844 signals, and further converts the MPEG signals. The converter A 902 and the converter B 9 perform a down-conversion to a 420p signal having a phase of a color difference signal conforming to the standard, and then perform MPEG compression.
03, the color difference signal is converted twice, which causes a problem that the image quality is deteriorated in the color difference signal. Further, even if a signal that has been encoded with high efficiency such as MPEG compression is decoded into a video signal, there is a problem that image quality is deteriorated in a color difference signal of the video signal.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a video signal transmission method and apparatus capable of solving the above-mentioned conventional problems and reducing image quality deterioration of a color difference signal of a progressive scanning signal when performing high-efficiency encoding and high-efficiency decoding. An object of the present invention is to provide a signal encoding method and apparatus and a video signal decoding apparatus.

[0006]

According to a first aspect of the present invention, there is provided a video signal transmitting method, wherein a sequential scanning signal including color difference information indicating a sample position of a color difference signal with respect to a luminance signal is transmitted. According to this method, when the transmitted signal is encoded with high efficiency, appropriate conversion can be performed on the color difference signal based on the color difference information, and unnecessary deterioration is not given to the color difference signal. A plurality of video signals can be transmitted on the transmission path.

According to a second aspect of the present invention, there is provided a video signal transmitting apparatus, wherein a conversion unit converts a phase and a number of samples of a color difference signal of the input signal or only the number of samples, using a digitized progressive scanning signal as an input signal. Multiplexing means for multiplexing the color difference information indicating the sample position of the color difference signal after the conversion by the conversion means with the output signal of the conversion means. With this configuration, when performing high-efficiency encoding of a transmitted signal, appropriate conversion can be performed on the color difference signal based on the color difference information, and unnecessary degradation is not given to the color difference signal. A plurality of video signals can be transmitted on the transmission path.

According to a third aspect of the present invention, there is provided a video signal transmission apparatus, wherein a digitized progressive scanning signal in which color difference information indicating a sample position of a color difference signal is multiplexed is used as an input signal, and the color difference information multiplexed in the input signal. Color difference information reading means for reading, the phase and the number of samples of the color difference signal of the input signal according to the color difference information read by the color difference information reading means,
Or a conversion means for converting only the number of samples.

According to this configuration, since the phase and the number of samples of the color difference signal of the input signal or only the number of samples are converted in accordance with the color difference information read by the color difference information reading means, appropriate conversion to the color difference signal is performed. Therefore, unnecessary degradation of the color difference signal is not given. According to a fourth aspect of the present invention, in the video signal encoding method, color difference information representing a sample position of a color difference signal with respect to a luminance signal is multiplexed on a highly efficient encoded video signal.

According to this method, when decoding highly efficient coded data, unnecessary deterioration due to erroneous conversion of the chrominance signal is prevented, and a plurality of types of signals can be encoded by the same encoder. Can be realized. A video signal encoding apparatus according to claim 5, wherein the digitized progressive scanning signal is used as an input signal, and the phase and the number of samples of the color difference signal of the input signal, or only the number of samples, are converted, and the output of the converting means is provided. An encoding unit for encoding a signal with high efficiency, and a multiplexing unit for multiplexing color difference information indicating a sample position of a color difference signal after conversion by the conversion unit with an output of the encoding unit are provided.

According to this configuration, the chrominance information representing the sample position of the chrominance signal converted by the conversion means is multiplexed with the output of the encoding means, so that proper conversion can be performed at the time of decoding, and the chrominance signal becomes unnecessary. Image quality degradation can be prevented. A video signal decoding apparatus according to claim 6, wherein a high-efficiency coded progressive scan signal on which color difference information indicating a sample position of the color difference signal is multiplexed is used as an input signal, and the input signal is decoded with high efficiency. Means, color difference information reading means for reading color difference information multiplexed in the input signal, and the phase and the number of samples of the color difference signal of the output signal of the decoding means according to the color difference information read by the color difference information reading means,
Or a conversion means for converting only the number of samples.

According to this structure, the phase and the number of samples of the chrominance signal of the output signal of the decoding means or only the number of samples are converted in accordance with the chrominance information read by the chrominance information reading means. Conversion can be performed, and image quality deterioration of the color difference signal can be reduced. A video signal encoding apparatus according to claim 7, wherein a digitized progressive scanning signal in which color difference information indicating a sample position of the color difference signal is multiplexed is used as an input signal, and coding means for performing high efficiency coding of the input signal is provided. A color difference information reading means for reading color difference information multiplexed in the input signal; and a multiplexing means for multiplexing the color difference information read by the color difference information reading means on the output of the encoding means.

According to this configuration, the color difference information read by the color difference information reading means is multiplexed with the output of the encoding means, so that compression can be performed without applying a double color filter, and the image quality of the color difference signal is reduced. Can be done. A video signal decoding apparatus according to claim 8, wherein a high-efficiency coded progressive scan signal on which color difference information indicating a sample position of a color difference signal is multiplexed is used as an input signal, and the input signal is decoded with high efficiency. Means, color difference information reading means for reading color difference information multiplexed in the input signal, and multiplexing means for multiplexing the color difference information read by the color difference information reading means on the output of the decoding means.

According to this configuration, by multiplexing the chrominance information read by the chrominance information reading means with the output of the decoding means, it becomes possible to know the phase of the chrominance signal of the output signal at the time of decoding. It is possible to appropriately convert the color difference signal into a color difference signal, and to reduce the image quality deterioration of the color difference signal. 10. A video signal encoding apparatus according to claim 9, wherein a digitized progressive scanning signal is used as an input signal, and a conversion means for converting or not converting the phase and the number of samples of the color difference signal of the input signal according to the input signal; Encoding means for encoding the output signal of the means with high efficiency; and multiplexing means for multiplexing the color difference information indicating the sample position of the color difference signal of the output signal of the conversion means with the output of the encoding means.

According to this configuration, the color difference information representing the sample position of the color difference signal of the output signal of the conversion means is multiplexed with the output of the encoding means, so that the compression can be performed without applying a double color filter. Unnecessary image quality degradation of a signal can be prevented. 11. A video signal decoding apparatus according to claim 10, wherein a high-efficiency coded progressive scan signal on which color difference information indicating a sample position of a color difference signal is multiplexed is used as an input signal, and the input signal is decoded with high efficiency. Means, color difference information reading means for reading color difference information multiplexed in the input signal, and converting the phase and the number of samples of the color difference signal with respect to the output signal of the decoding means according to the color difference information read by the color difference information reading means or Conversion means for non-conversion.

According to this configuration, the phase and the number of samples of the color difference signal with respect to the output signal of the decoding means are converted or non-converted in accordance with the color difference information read by the color difference information reading means, so that the processing suitable for the color difference signal is performed. Do
Image quality deterioration can be reduced.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A first embodiment of the present invention will be described below. As described in the conventional example, as a standard of the 420p signal which is a progressive scanning signal, the transmission standard SMPTE
There are 294M and compression standard MPEG, and both standards deal with 4
The 20p signal is not exactly the same, and the sample position of the color difference signal with respect to the luminance signal is different. Therefore, the first
In the video signal transmission method according to the embodiment, a signal indicating a sample position of a color difference signal with respect to a luminance signal is multiplexed with a scanning signal and transmitted. Accordingly, when the transmitted signal is encoded with high efficiency, appropriate conversion can be performed on the chrominance signal based on the chrominance information, and unnecessary degradation is not given to the chrominance signal. It becomes possible to transmit a plurality of video signals on a road.

The portion where the signal indicating the sampling position of the color difference signal is recorded is arbitrary, and can be similarly applied to signals other than the above two standards, and the number of standards handled is also arbitrary. [Second Embodiment] A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a video signal transmission apparatus according to a second embodiment of the present invention. Reference numeral 101 denotes an input terminal for inputting an 844 signal which is a progressive scanning signal, and 102 and 105 are switched according to a control signal. A switch 103 for down-converting the color difference signal of the input signal to SMPTE 294M characteristics; a converter 104 for down-converting the color difference signal of the input signal to MPEG characteristics;
107 outputs a control signal for switching between the switch 102 and the switch 105 to select the converter A 103 or the converter B 104, and outputs the selected converter A
A conversion controller 103 for outputting color difference information of the sample position of the color difference signal obtained by the converter 103 or the converter B 104;
Reference numeral 6 denotes a color difference information recorder (multiplexing means) for recording color difference information in an input signal. The converter A103, the converter B104, the switches 102 and 105, and the conversion controller 107 constitute a conversion unit.

The operation of the video signal transmission device configured as described above will be described. From the input terminal 101,
An 844 signal which is a progressive scanning signal is input. The conversion controller 107 determines that the color difference signal is at 420 p at the desired sample position.
A control signal for selecting the converter A103 or the converter B104 is output to the switch 102 and the switch 105 so that the signal 844 is converted into a signal. Here, SMPTE294M is used as a 420p signal.
When a signal of the standard is desired, the converter A103 is selected, and when a signal of the MPEG standard is desired as the 420p signal, the switch 102 and the switch 105 are switched so as to select the converter B104. Further, the conversion controller 107 outputs color difference information relating to the sample position of the color difference signal obtained by the selected converter A103 or converter B104 to the color difference information recorder 106. The color difference information recorder 106 multiplexes color difference information with the converted signal and outputs the multiplexed signal.

As described above, according to this embodiment,
The color difference information from the conversion controller 107 is stored in the color difference information recorder 10.
By recording at 6, it becomes possible to transmit a plurality of types of signals on the same running path. In addition, even when a transmitted signal is encoded with high efficiency, appropriate conversion can be performed on the color difference signal based on the color difference information, and unnecessary deterioration is not given.

The portion for recording the color difference information is arbitrary, can be similarly applied to signals other than the above two standards, and the number of standards handled is also arbitrary. Here, other standards 4
When there is a 20p signal, a converter corresponding to the signal is required, so that the number of converters or the converter must be changed. The converter A103 converts the input 844 signal into a 420p signal of the SMPTE294M standard. In this case, the converter A103 only needs to convert only the number of samples. The converter B104 converts the input 844 signal into the MPEG standard. In this case, the converter needs to convert both the number of samples and the phase. Note that converters A and B in the following embodiments
The same applies to.

[Third Embodiment] The third embodiment of the present invention will be described below.
An embodiment will be described with reference to the drawings. FIG. 2 is a block diagram of a video signal transmission device according to a third embodiment of the present invention.
201 is an input terminal for inputting a 420p signal, 202 is a color difference information reader (color difference information reading means) for reading color difference information indicating a sample position of a color difference signal from the input signal,
203 and 206 are switches that are switched according to the control signal, and 204 is a SMPTE 294M switch for the color difference signal of the input signal.
A, 205, which up-converts the color difference signal of the input signal, and B, 207, which convert the color difference signal of the input signal
Converter A204 according to the color difference information input from
Alternatively, it is a conversion controller that outputs a control signal to the switches 203 and 206 so as to switch the selection of the converter B205. The converter A204, the converter B205, the switches 203 and 206, and the conversion controller 207 constitute conversion means.

The operation of the video signal transmission device configured as described above will be described. From the input terminal 201,
A 420p signal which is a progressive scanning signal is input. This 4
The 20p signal is multiplexed with chrominance information on the sample position of the chrominance signal, and the chrominance information reader 202 reads the chrominance information and outputs it to the conversion controller 207. The conversion controller 207 switches between the converter A 204 and the converter B 205 according to the color difference information from the color difference information reader 202 to up-convert the color difference signal, and
A control signal is output to the switches 203 and 206 so as to convert the signal into an 844 signal. That is, the conversion controller 207 outputs the 420p input to the input terminal 201.
If the signal is based on the SMPTE294M standard, the converter A2
When switch 04 is selected and the 420p signal conforms to the MPEG standard, switch 203 and switch 206 are switched by a control signal so as to select converter B205.

As described above, according to this embodiment,
Based on the color difference information read by the color difference information reader 202, the conversion controller 207 and the switches 203 and 206 select the converter A204 and the converter B205 to be used, so that the appropriate converter can convert the color difference signal. Therefore, unnecessary deterioration of the color difference signal is not given.

The portion where the color difference information is recorded in the input signal is arbitrary, the same can be applied to signals other than the above two standards, and the number of standards handled is also arbitrary. [Fourth Embodiment] Hereinafter, a fourth embodiment of the present invention will be described. In the video signal encoding method according to the fourth embodiment, color difference information for determining a sample position of a color difference signal with respect to a luminance signal is recorded in a compressed stream containing highly efficient encoded data. Accordingly, when decoding highly efficient encoded data, unnecessary deterioration due to erroneous conversion of the chrominance signal is prevented, and a plurality of types of signals can be encoded by the same encoder. It becomes possible.

The part where the color difference information for determining the sample position of the color difference signal is recorded is arbitrary, and S
The present invention is similarly applicable to signals other than the MPTE294M standard and the MPEG standard, and the number of standards handled is arbitrary. [Fifth Embodiment] Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings.

FIG. 3 is a block diagram of a video signal encoding apparatus according to a fifth embodiment of the present invention. Reference numeral 301 denotes an input terminal for inputting an 844 signal which is a progressive scanning signal, and 303 denotes an SMPTE 294M color difference signal of the input signal. The converter A 304 down-converts the characteristics of the input signal, and the converter B 304 down-converts the color difference signal of the input signal to the characteristics of MPEG.
Reference numeral 302 denotes a switching converter (converting means) for switching between the converter A 303 and the converter B 304 to convert an input signal,
Reference numeral 5 denotes an encoding unit (encoding means) for performing high-efficiency encoding of an input signal, and reference numeral 306 denotes a stream for creating a compressed stream from highly-efficient encoded data and additional information (color difference information and information relating to high-efficiency encoding). Creation unit (multiplexing means), 3
Reference numeral 07 denotes a high-efficiency encoder including an encoding unit 305 and a stream creation unit 306.

The operation of the video signal encoding apparatus configured as described above will be described. From the input terminal 301, an 844 signal which is a sequential scanning signal is input. The switching converter 302 determines the sampling position 42 of the desired color difference signal.
The converter A303 and the converter B30 so as to obtain the 0p signal.
4 to convert the 844 signal into a 420p signal. Here, the converter A303 is selected when a signal of the SMPTE294M standard is desired as the 420p signal, and the converter B304 is selected when a signal of the MPEG standard is desired as the 420p signal. The switching converter 302 outputs the converted 420p signal and color difference information, which is information on the sample position of the color difference signal obtained by the used converter A303 or converter B304, to the high-efficiency encoder 307. The high-efficiency encoder 307 performs high-efficiency encoding of the converted 420p signal in the encoding unit 305,
At 06, a compressed stream is created and output by adding the color difference information from the switching converter 302 and the information relating to the high efficiency coding to the video signal that has been subjected to the high efficiency coding.

As described above, according to this embodiment,
When the color difference information on the sample position of the color difference signal by the converter used by the switching converter 302 is recorded in the compressed stream by the stream creation unit 306, when decoding, unnecessary image quality due to incorrect conversion of the color difference signal is obtained. Deterioration can be prevented. In this embodiment,
The same applies to signals other than the above two standards, the number of standards handled is arbitrary, and the position where color difference information is recorded is also arbitrary.

[Sixth Embodiment] The sixth embodiment of the present invention will be described below.
An embodiment will be described with reference to the drawings. FIG. 4 is a block diagram of a video signal decoding apparatus according to a sixth embodiment of the present invention. Reference numeral 401 denotes an input terminal for inputting a compressed stream of a progressive scanning signal; A chrominance information reader 403 for reading chrominance information relating to the sample positions; 403, a high-efficiency decoder (decoding means) for high-efficiency decoding of the compressed stream; 405, a converter A for up-converting the input signal to SMPTE294M characteristics; Reference numeral 406 denotes a converter B for up-converting the input signal to MPEG characteristics, and 404 denotes a converter A4.
This is a switching converter (conversion means) that converts the input signal by switching between the converter 05 and the converter B406.

The operation of the video signal decoding apparatus configured as described above will be described. From the input terminal 401, a stream of compressed progressive scanning signals is input. Color difference information relating to the sample position of the color difference signal is added to this compressed stream, and the color difference information reader 402 reads color difference information from the compressed stream,
The color difference information is output to the switching converter 404. The high-efficiency decoder 403 decodes the compressed stream into a 420p signal, which is a video signal, and outputs it to the switching converter 404. The switching converter 404 converts the converter A 40 based on the color difference information input from the color difference information reader 402.
5 and a converter B 406, and converts the decoded video signal 420p signal into an 844 signal and outputs it.
Here, if the 420p signal input to the switching converter 404 is based on the SMPTE294M standard from the color difference information, the converter A204 is selected, and the switching converter 404 is selected.
If the 420p signal conforms to the MPEG standard, the converter B2
05 is selected.

As described above, according to this embodiment,
Based on the color difference information read by the color difference information reader 402, the switching converter 404 selects an appropriate converter and performs appropriate conversion, so that the image quality deterioration of the color difference signal can be reduced. This embodiment can be similarly applied to signals other than the above two standards, and the number of standards handled is arbitrary.

[Seventh Embodiment] The seventh embodiment of the present invention will be described below.
An embodiment will be described with reference to the drawings. FIG. 5 is a block diagram of a video signal encoding apparatus according to a seventh embodiment of the present invention. Reference numeral 501 denotes an input terminal for inputting a 420p signal;
Reference numeral 503 denotes a color difference information reader which reads and outputs color difference information relating to a sample position of the color difference signal multiplexed on the 420p signal, 503 denotes an encoding unit for performing high efficiency encoding of the 420p signal, and 504 denotes a high efficiency encoded data and an addition. A stream creation unit for creating a compressed stream from information (color difference information and information on high-efficiency encoding);
03 and a stream creation unit 504.

The operation of the video signal encoding apparatus configured as described above will be described. From an input terminal 501, a SMPTE 294M compliant or MPEG2 compliant 42
The 0p signal is input. The color difference information reader 502 reads which of the above-mentioned standards the input signal is at the sampling position of the signal, and outputs it to the high efficiency encoder 505 as color difference information. The high-efficiency encoder 505 performs high-efficiency encoding of the input signal in the encoding unit 503 and outputs the stream signal to the stream creation unit 504.
Output to The stream creation unit 504 creates and outputs a compressed stream by adding color difference information and information related to high efficiency coding to the input signal that has been subjected to high efficiency coding.

As described above, according to this embodiment,
By creating a stream including the color difference information obtained by the color difference information reader 502 by the stream creation unit 504, it is possible to perform compression without applying a color filter twice, and to reduce image quality deterioration of the color difference signal. This embodiment can be similarly applied to signals other than the above two standards, and the number of standards handled is arbitrary. The part for recording the color difference information is optional.

[Eighth Embodiment] An eighth embodiment of the present invention will be described below.
An embodiment will be described with reference to the drawings. FIG. 6 is a block diagram of a video signal decoding apparatus according to an eighth embodiment of the present invention. Reference numeral 601 denotes an input terminal for inputting a compressed stream of a progressive scanning signal, and 602 relates to a sample position of a color difference signal from the input stream. A color difference information reader 603 for reading color difference information, a high efficiency decoder 603 for high efficiency decoding of an input stream, and a color difference information recorder 604 for recording color difference information in high efficiency decoded data.

The operation of the video signal decoding apparatus configured as described above will be described. From the input terminal 601, a stream of compressed progressive scanning signals is input. The input stream is multiplexed with color difference information relating to the sample position of the color difference signal, and the color difference information reader 602 reads the color difference information from the input stream,
Output to the color difference information recorder 604. High efficiency decoder 60
3 decodes the input stream into a video signal and outputs it to the color difference information recorder 604. The chrominance information recorder 604 multiplexes the chrominance information with the decoded video signal and outputs the multiplexed chrominance information.

As described above, according to this embodiment,
The color difference information reader 602 reads out color difference information relating to the sample position of the color difference signal, and the color difference information recorder 604.
By multiplexing with the output video signal, the phase of the color difference signal of the output signal can be known at the time of decoding, and for example, a 420p signal output from the color difference information recorder 604 can be converted into an 844 signal using an appropriate converter. Conversion becomes possible, and image quality deterioration of the color difference signal can be reduced.

In this embodiment, the SMPTE 29
The same applies to signals other than the 4M standard and the MPEG standard, and the number of standards handled is arbitrary. The part for recording the color difference information is optional. [Ninth Embodiment] A ninth embodiment of the present invention will be described below with reference to the drawings.

FIG. 7 is a block diagram of a video signal encoding apparatus according to a ninth embodiment of the present invention. Reference numeral 701 denotes an input terminal for inputting an 844 signal, 702 denotes an input terminal for inputting a signal of the SMPTE294M standard, and 703 denotes an input terminal. The phase and the number of samples of the color difference signal of the input signal are converted to the color difference signal by MPE.
Converter B 704 for down-converting the characteristics of G
Is a switching converter (conversion means) for switching an input signal,
Reference numeral 705 denotes an encoding unit that encodes the input signal with high efficiency, and 706
Is a stream creation unit for creating a compressed stream from highly efficient encoded data and additional information (color difference information and information on high efficiency encoding), and 707 is a high efficiency code comprising an encoding unit 705 and a stream creation unit 706. It is a gasifier.

The operation of the video signal encoding apparatus configured as described above will be described. From the input terminal 701, a 844 signal which is a sequential scanning signal is input.
From 02, a signal of the SMPTE294M standard is input. In the switching converter 704, the signal from the input terminal 701 is converted into a color difference signal by the converter B 703 according to the MPEG standard 42.
0p signal is down-converted and input terminal 7
02 is output to the encoding unit 705 of the high-efficiency encoder 707, and the encoding unit 705
Chrominance information about the sample position of the chrominance signal of the signal to be output to the
Output to In the high efficiency encoder 707, the encoding unit 70
5 is encoded with high efficiency and output to the stream creation unit 706. In the stream creation unit 706,
A compressed stream is created and output by adding color difference information and information related to high efficiency coding to a video signal that has been highly efficient coded.

As described above, according to this embodiment,
By recording the sample position of the color difference signal of the signal output from the switching converter 704 in the compressed stream by the stream creation unit 706, compression can be performed without applying a double color filter, and unnecessary color difference signal Image quality deterioration can be prevented. This embodiment can be similarly applied to signals other than the above two standards, the number of standards handled is arbitrary, and the position where color difference information is recorded is also arbitrary.

[Tenth Embodiment] A tenth embodiment of the present invention will be described below with reference to the drawings. FIG. 8 is a block diagram of a tenth video signal decoding apparatus according to the present invention.
Reference numeral 1 denotes an input terminal for inputting a compressed stream of a sequential scanning signal; 802, a color difference information reader that reads color difference information relating to a sample position of a color difference signal from the input stream; 803, high efficiency decoding that decodes the input stream with high efficiency A converter 805 converts the phase and the number of samples of the chrominance signal of the input signal and up-converts the chrominance signal into an MPEG characteristic, and a converter 804 converts the input signal by the converter B 805 and outputs the converted signal. Alternatively, a switching converter (conversion means) for outputting as it is, 806, 80
7 is an output terminal.

The operation of the video signal decoding device configured as described above will be described. From the input terminal 801, a stream of a compressed progressive scanning signal is input. The input stream is multiplexed with chrominance information on the sample position of the chrominance signal, and the chrominance information reader 802 reads out the chrominance information from the input stream and outputs it to the switching converter 804. High efficiency decoder 803
Decodes the input stream into a video signal and outputs it to the switching converter 804. In the switching converter 804, if the sample position of the input color difference information is MPEG,
The video signal is up-converted by the converter 805 and output from the output terminal 806, and the other signals are directly output from the output terminal 807 to the SMPTE 294M standard transmission line without conversion.

As described above, according to this embodiment,
Based on the color difference information on the sample position of the color difference signal obtained by the color difference information reader 802, the switching converter 804
By performing the appropriate conversion or not at
Appropriate processing can be performed on the color difference signal to reduce image quality deterioration. This embodiment can be similarly applied to signals other than the above two standards, and the number of standards handled is arbitrary.

[0047]

As described above, according to the present invention, by multiplexing the sample positions of the chrominance signal with respect to the luminance signal and transmitting the multiplexed signal, the chrominance difference is determined based on the chrominance information when the transmitted signal is encoded with high efficiency. Signals can be properly converted, and unnecessary degradation of the color difference signals is prevented.
Further, by multiplexing the color difference information with the highly efficient encoded video signal, when decoding the highly efficient encoded data, unnecessary deterioration due to an error in the conversion of the color difference signal is prevented. As described above, it is possible to reduce the image quality deterioration of the color difference signal.

[Brief description of the drawings]

FIG. 1 is a block diagram of a video signal transmission device according to a second embodiment of the present invention.

FIG. 2 is a block diagram of a video signal transmission device according to a third embodiment of the present invention.

FIG. 3 is a block diagram of a video signal encoding device according to a fifth embodiment of the present invention.

FIG. 4 is a block diagram of a video signal decoding device according to a sixth embodiment of the present invention.

FIG. 5 is a block diagram of a video signal encoding device according to a seventh embodiment of the present invention.

FIG. 6 is a block diagram of a video signal decoding device according to an eighth embodiment of the present invention.

FIG. 7 is a block diagram of a video signal encoding device according to a ninth embodiment of the present invention.

FIG. 8 is a block diagram of a video signal decoding device according to a tenth embodiment of the present invention.

FIG. 9 is a block diagram of a conventional video signal encoding device.

[Explanation of symbols]

101, 201, 301, 401, 501, 601, 7
01, 702, 801, 901 Input terminal 102, 105, 203, 206 Switch 103, 204, 303, 405, 902 Converter A 104, 205, 304, 406, 703, 805, 9
03 Converter B 106, 604 Color difference information recorder 107, 207 Conversion controller 202, 402, 502, 602, 802 Color difference information reader 302, 404, 704, 804 Switching converter 305, 503, 705 Encoding unit 306, 504, 706 stream creation unit 307, 505, 707, 904 high-efficiency encoder 403, 603, 803 high-efficiency decoder 806, 807 output terminal

Claims (10)

[Claims] 1. A video signal transmission method comprising transmitting a progressive scanning signal including color difference information indicating a sample position of a color difference signal with respect to a luminance signal. 2. The method according to claim 1, wherein the digitized progressive scanning signal is used as an input signal, and the phase and the number of samples of a color difference signal of the input signal are calculated.
Alternatively, a video signal transmission apparatus comprising: a conversion unit that converts only the number of samples; and a multiplexing unit that multiplexes color difference information indicating a sample position of the color difference signal converted by the conversion unit with an output signal of the conversion unit. 3. A color difference information reading means for taking a digitized sequential scanning signal in which color difference information indicating a sample position of a color difference signal is multiplexed as an input signal, and reading the color difference information multiplexed in the input signal. A video signal transmission device comprising: a conversion unit that converts only the phase and the number of samples of the color difference signal of the input signal or only the number of samples according to the color difference information read by the color difference information reading unit. 4. A video signal encoding method characterized by multiplexing color difference information indicating a sample position of a color difference signal with respect to a luminance signal, on a highly efficient encoded video signal. 5. A conversion means for converting a digitized progressive scanning signal into an input signal and converting only the phase and the number of samples of a color difference signal of the input signal, or only the number of samples, and converting an output signal of the conversion means into a high-efficiency code. Encoding means for encoding;
A video signal encoding apparatus comprising: a multiplexing unit that multiplexes color difference information indicating a sample position of a color difference signal after conversion by the conversion unit with an output of the encoding unit. 6. A decoding means for receiving, as an input signal, a high-efficiency-encoded progressive scanning signal on which color-difference information indicating a sample position of a color-difference signal is multiplexed, and decoding said input signal with high efficiency. A color difference information reading means for reading the color difference information multiplexed in the; a phase and the number of samples of the color difference signal of the output signal of the decoding means according to the color difference information read by the color difference information reading means, or the number of samples; A video signal decoding device comprising: a conversion unit for converting only the video signal. 7. An encoding means for inputting a digitized progressive scanning signal in which color difference information indicating a sample position of a color difference signal is multiplexed as an input signal, and encoding the input signal with high efficiency. A video signal encoding device comprising: color difference information reading means for reading the multiplexed color difference information; and multiplexing means for multiplexing the color difference information read by the color difference information reading means on an output of the encoding means. 8. A decoding means for inputting a high-efficiency coded progressive scanning signal on which color difference information indicating a sample position of a color difference signal is multiplexed, and decoding said input signal with high efficiency, and said input signal. A video signal decoding device comprising: color difference information reading means for reading the color difference information multiplexed therein; and multiplexing means for multiplexing the color difference information read by the color difference information reading means on an output of the decoding means. 9. A conversion means for converting a digitized progressive scanning signal into an input signal, converting or not converting the phase and the number of samples of a color difference signal of the input signal according to the input signal, and an output signal of the conversion means. And a multiplexing unit for multiplexing color difference information indicating a sample position of a color difference signal of an output signal of the conversion unit with an output of the coding unit. 10. A decoding means for inputting a high-efficiency coded progressive scanning signal in which color difference information indicating a sample position of a color difference signal is multiplexed, and decoding said input signal with high efficiency. A color difference information reading means for reading the color difference information multiplexed in the memory, and converting or not converting the phase and the number of samples of the color difference signal with respect to the output signal of the decoding means according to the color difference information read by the color difference information reading means. A video signal decoding device comprising: a conversion unit for converting.