JPH09284647A - Edit/transmission system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the number of connected edit terminal equipments by outputting a key signal for cut joints to a key generating section and synthesizing sources in response thereto so as to conduct edit/transmission while keeping a high compression rate possessed substantially by the MPEG(moving picture expert group). SOLUTION: In the case of editing video/audio data expanded and decoded by MPEG decoders 3, 4, an edit terminal 7 gives a control signal to a key generating section 6 to allow the generating section 6 to output a key signal used to joint cuts of sources of the video/audio data expanded and decoded by the MPEG decoders 3, 4. A switcher 5 in response to the key signal joints cuts of sources of the video/audio data expanded and decoded by the MPEG decoders 3, 4 and synthesizes the result as a synthesized source. The edit terminal 7 decided an address denoting a source to be on-air and an edit point denoting the cut joint points based on the synthesized source and gives the results to an AV server 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an editing / sending system for editing a video / sound signal into a video / sound material such as news used in TV broadcasting and sending it for use in a program.

[0002]

2. Description of the Related Art A conventional editing / sending system, as shown in FIG. 4, compresses and encodes a video / audio signal and outputs the compression-encoded video / audio data.
oint Photographic Coding Experts Group) encoder 15. The AV (Audio Visual) server 16 stores the compression-encoded video / audio data.

The JPEG decoder 17 expands and decodes the accumulated video / audio data. The editing terminal 18 edits the decompressed and decoded video / audio data into a material to be aired, and sets an address A for determining the material to be aired.
The data is sent to the V server 16 to cause the AV server 16 to output the above-mentioned on-air material.

The OA (on-air) server 19 stores materials to be on-air. The JPEG decoder 20 expands and decodes the accumulated on-air material and sends it.

AV server 16 and JPEG decoder 17
And the editing terminal 18 and the AV server 16 are connected via a network 21, and the AV server 16 and the OA server 19 are connected via a network 22.

[0006]

In this editing / sending system, since the video / audio signal is encoded by the intra-frame compression in the JPEG encoder 15, the compression rate is low, so that the AV server 16 edits the editing terminal 18 or OA. The amount of data transferred to the server 19 is large. Therefore, even if a high-speed and large-capacity network is used as the network 21, the number of streams cannot be obtained so much, and there is a problem that the number of editing terminals 18 connected to the AV server 16 is limited.

Also, in order to obtain a high compression rate, MPEG (M
oving Picture Coding Experts Group), etc.
Even if OP is used, there is a problem that materials can be connected only in GOP units. The MPEG encoder divides the video / audio signal into GOPs (Group of pictures) composed of a plurality of pictures (that is, frames) and performs encoding. Further, if the GOP is made small in order to solve this problem, the compression rate cannot be made high this time, and the same problem as in the case of the above-mentioned JPEG has occurred.

[0008] Therefore, an object of the present invention is to enable editing / sending while keeping the high compression rate that MPEG originally has, thereby increasing the number of AV server streams. It is to provide an editing / sending system capable of increasing the number of editing terminals connected to a server.

[0009]

According to the present invention, a video /
An MPEG (Moving Picture Cod) that compresses and encodes an audio signal and outputs compression-encoded video / audio data.
ing Experts Group) encoder, an AV (audio-visual) server that stores compression-encoded video / audio data as accumulated video / audio data, first and second MPEG decoders, and the AV server. , The stored video / audio data as the first
And output to the second MPEG decoder and the accumulated video / audio data to the first and second MPs.
The editing terminal is provided with an editing terminal for decompressing and decoding by the EG decoder, a first key generation unit, and a first switcher, and the editing terminal is the video / audio data decompressed and decoded by the first and second MPEG decoders. When editing, the first control signal is given to the first key generation unit so that the material of the video / audio data decompressed and decoded by the first MPEG decoder and the decompressed and decoded by the second MPEG decoder are given. A first key signal for cutting and connecting the material of the generated video / audio data is output to the first key generation unit, and the first switcher responds to the first key signal, The material of the video / audio data decompressed and decoded by the first MPEG decoder and the second MPEG
Cut and connect the material of the video / audio data that has been decompressed and decoded by the decoder, and synthesize as a synthesized material,
The editing terminal determines, from the combined material, an address representing an on-air material and an edit point representing a cut connection point, and sends the address and the edit point to the AV server. / A delivery system is obtained.

Further, according to the present invention, the AV server and the first and second MPEG decoders and the editing terminal and the AV server are connected by a first network. An editing / transmission system is obtained.

Further, according to the present invention, the AV server is responsive to the address and the editing point from the editing terminal, and the AV server represents the address represented by the address in the stored video / audio data. An editing / sending system is characterized in that on-air materials are generated as first and second on-air materials to be synthesized with each other, and these first and second on-air materials are output together with the editing points. can get.

Further, according to the present invention, the first and second on-air materials output from the AV server are accumulated, and the second material is output based on the editing point output from the AV server. O that outputs the control signal of
An A (on-air) server and a third M for expanding and decoding the first on-air material stored in the OA server.
A PEG decoder, a fourth MPEG decoder for expanding and decoding the second on-air material stored in the OA server, and a third MPEG decoder for expanding and decoding in response to the second control signal. A second key generation unit for generating a second key signal for cutting and connecting the first on-air material and the second on-air material decompressed and decoded by the fourth MPEG decoder; In response to the key signal of, the first on-air material expanded and decoded by the third MPEG decoder and the second on-air material expanded and decoded by the fourth MPEG decoder are cut and combined to be combined. An editing / delivery system is obtained which further comprises a second switcher.

According to the present invention, the AV server and the first and second MPEG decoders and the editing terminal and the AV server are connected by a first network, An editing / sending system is obtained in which a server and the OA server are connected by a second network.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1, an editing / sending system according to one embodiment of the present invention compresses a video / audio signal and outputs a compression-encoded video / audio data from an MPEG (Moving Picture Coding Experts Group) encoder. Have one. The AV (Audio Visual) server 2 stores the compressed / encoded video / audio data as the stored video / audio data.

The editing terminal 7 causes the AV server 2 to send the stored video / audio data to the MPEG decoders 3 and 4.
To output to MPE the stored video / audio data.
The G decoders 3 and 4 are expanded and decoded.

Further, the editing terminal 7 includes an MPEG decoder 3
When editing the video / audio data decompressed and decoded by 4 and 4, a control signal is given to the key generation unit 6 so that the material of the video / audio data expanded and decoded by the MPEG decoder 3 and the material decoded by the MPEG decoder 4 are expanded and decoded. The key generation unit 6 is caused to output a key signal for cutting and connecting the material of the video / audio data.

The switcher 5 responds to the key signal by
The material of the video / audio data expanded / decoded by the MPEG decoder 3 and the material of the video / audio data expanded / decoded by the MPEG decoder 4 are cut and combined to be combined as a combined material.

The editing terminal 7 uses the synthesized material to
An address indicating a material to be aired and an edit point indicating a cut connection point are determined, and these address and edit point are sent to the AV server 2.

A network 13 is connected between the AV server 2 and the MPEG decoders 3 and 4, and between the editing terminal 7 and the AV server 2.

In response to the address and editing point from the editing terminal 7, the AV server 2 should synthesize the on-air material represented by the address in the stored video / audio data with each other. The first and second on-air materials are generated, and the first and second on-air materials are output together with the edit points.

The OA (on-air) server 11 stores the first and second on-air materials output from the AV server 2, and outputs a control signal based on the editing point output from the AV server 2. To do.

The MPEG decoder 9 is an OA server 11
Decompress and decode the first on-air material stored in.

The MPEG decoder 10 is the OA server 1.
The second on-air material stored in 1 is expanded and decoded.

The key generator 8 responds to the control signal by sending an M
A key signal for cutting and connecting the first on-air material expanded and decoded by the PEG decoder 9 and the second on-air material expanded and decoded by the MPEG decoder 10 is generated.

In response to the key signal, the switcher 12 cuts and connects the first on-air material expanded and decoded by the MPEG decoder 9 and the second on-air material expanded and decoded by the MPEG decoder 10. .

A network 14 connects the AV server 2 and the OA server 11.

Next, the features of the editing / sending system of FIG. 1 will be described.

The AV server 2 has a management means for managing the accumulated video / audio data in both GOP units and frame units.

Video / audio signals to be used as news material are compressed and encoded by the MPEG encoder 1.
The compressed / encoded video / audio data is taken into the AV server 2. The captured data is registered and managed by giving a file name to each news item.

On the other hand, the editing terminal 7 requests the AV server 2 for the filed news material as shown in FIG. 2, and sends this news material to the MPEG decoders 3 and 4, and the MPEG decoder 3 and With the output of 4, while confirming the content of the material, the address representing the material to be aired and the edit point representing the cut connection point are determined.

Suppose that the material A and the material B are cut and connected as shown in FIG. 2 and used for news, as shown in FIG. Material A is cut out at the in and out points where it is used. Similarly, the point where the B material is also used is cut out at the IN point and the OUT point. Then, naturally, it is different from the cut of GOP. Therefore, as shown in FIG. 2, the management of the A material is performed by GOP2 in the form of including it in addition to the break in each frame.
A'material composed of 4 is newly defined.
The material is managed by the AV server 2 together with the material A. Also,
Regarding the management of B material, a B'material composed of GOPs 5 to 7 is newly defined in a form including a break separately for each frame, and this B'material is managed by the AV server 2 together with the B material. .

In the OA server 11, the A'material and the B'material are transferred as encoded data, which are simultaneously decoded and simultaneously synthesized by the switcher 12 using the key signal generated in frame units, Achieves B cut connection.

As described above, in this system, when the material data is managed by the AV server 2 or the editing terminal 7, the management of GOP unit and the management of frame unit are used in a hierarchical manner, and the IN point, the OUT point, etc. are combined. The method of managing the address of the material to be aired and the edit point that represents the cut connection point is used. Further, the OA server 11 generates a key signal based on this management data and outputs it to the switcher 12, so that cut editing can be realized.

By adopting such a method, editing can be realized even in MPEG. Therefore, since data can be encoded at a higher compression rate than JPEG, a large number of streams can be obtained even on the same network.

[0036]

As described above, according to the present invention, the MPE
Edit / using the high compression rate that G originally has
Since it can be sent, the number of streams on the server can be increased and the number of editing terminals can be increased.

[Brief description of drawings]

FIG. 1 is a block diagram of an editing / sending system according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining the features of the editing / sending system of FIG.

FIG. 3 is a diagram for explaining the features of the editing / sending system of FIG.

FIG. 4 is a block diagram of a conventional editing / transmission system.

[Explanation of symbols]

 1 MPEG Encoder 2 AV Server 3 MPEG Decoder 4 MPEG Decoder 5 Switcher 6 Key Generation Unit 7 Editing Terminal 8 Key Generation Unit 9 MPEG Decoder 10 MPEG Decoder 11 OA Server 12 Switcher 13 Network 14 Network 15 JPEG Encoder 16 AV Server 17 JPEG Decoder 18 Editing terminal 19 OA server 20 JPEG decoder 21 Network 22 Network

Claims (5)

[Claims] 1. An MPE for compressing and encoding a video / audio signal and outputting the compression-encoded video / audio data.
A G (Moving Picture Coding Experts Group) encoder, an AV (audio visual) server that stores compressed / encoded video / audio data as accumulated video / audio data, first and second MPEG decoders, and Let the AV server output the stored video / audio data to the first and second MPEG decoders, and have the first and second MPEG decoders expand and decode the stored video / audio data. An editing terminal, a first key generation unit, and a first switcher are provided, and the editing terminal edits the video / audio data expanded and decoded by the first and second MPEG decoders. A first control signal is applied to the first key generation unit to cause the first MPEG decoder to expand and decode the video / audio data. A first key signal for cutting and connecting the material of No. 1 and the material of the video / audio data decompressed and decoded by the second MPEG decoder to the first key generation unit, and the first switcher Cutting, in response to the first key signal, the material of the video / audio data expanded and decoded by the first MPEG decoder and the material of the video / audio data expanded and decoded by the second MPEG decoder. Connected and combined as a combined material, the editing terminal determines, from the combined material, an address representing an on-air material and an edit point representing a cut connection point, and sets the address and the edit point. An editing / transmission system for transmitting to the AV server. 2. Between the AV server and the first and second MPEG decoders, and between the editing terminal and the A
The editing / sending system according to claim 1, wherein the V server is connected by a first network. 3. The AV server, in response to the address and the editing point from the editing terminal, exchanges the on-air material represented by the address in the stored video / audio data with each other. The editing / sending system according to claim 1, wherein the editing / sending system generates the first and second on-air materials to be combined with each other, and outputs the first and second on-air materials together with the editing point. 4. The first and second on-air material output from the AV server is accumulated, and
An OA (on-air) server that outputs a second control signal based on the editing point output from the AV server, and a third MPEG that expands and decodes the first on-air material stored in the OA server. A decoder, a fourth MPEG decoder for expanding and decoding the second on-air material stored in the OA server, and a fourth expansion decoder for expanding and decoding by the third MPEG decoder in response to the second control signal. 1 on-air material and 2nd expanded and decoded by the 4th MPEG decoder
A second key generation unit for generating a second key signal for cutting and connecting the on-air material of the second key, and a third key which is expanded and decoded by the third MPEG decoder in response to the second key signal. 1 on-air material and 2nd expanded and decoded by the 4th MPEG decoder
4. A second switcher for cutting and connecting the material for on-air cutting and synthesizing the same.
Editing / sending system described in. 5. Between the AV server and the first and second MPEG decoders, and between the editing terminal and the A
The editing / sending system according to claim 4, wherein a V server is connected by a first network, and the AV server and the OA server are connected by a second network.