JP2000341690A - Data transmitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the distortion of an image on the side of decoding by encoding one or plural pieces of input image data for a prescribed encoding unit according to a method including variable length encoding, and switching any one piece of data for a prescribed encoding unit corresponding to a prescribed switching signal. SOLUTION: Image encoders 11-1N image data G1-GN for the unit of GOP constituted by combining prescribed frames and generate encoded image signals P1-PN and a switching signal generating part 2 generates a switching signal S3 for instructing selecting/switching of encoded image signals P1-PN. An image switcher 3 selects the encoded image signals P1-PN corresponding to the switching signal S3 and outputs encoded image data S5 and a GOP timing generating part 4 generates an image encoding timing signal C1 for the unit of image encoding GOP and an image switching timing signal C2 for the unit of GOP.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmitting apparatus that performs image encoding in real time using a plurality of image encoding means while transmitting data at the same timing, and transmits data.

[0002]

2. Description of the Related Art Conventionally, in a data transmitting apparatus such as a broadcasting station, selective output has been performed while synchronizing coded data previously encoded by an encoding means.

For example, FIG. 11 is a block diagram showing a conventional data switching device provided in a television studio or the like. In FIG. 11, reference numerals 110A and 110B are reception data input to the apparatus as analog television signals (NTSC signals or the like). The reception data 110A and 110B include information indicating a frame (synchronization) such as a vertical drive pulse. 101A and 101B are frame detectors, and 102A and 102B are frame detectors 101A and 101B under the control of the control unit 103, respectively.
At the timing notified from the reception data 101A, 1
01B is a switch for turning on / off 01B, and 103 is a switch 102A, in response to an external switching request (not shown).
This is a control unit for turning on any of 102B.

Next, the operation will be described. The plurality of reception data 110A and 110B input to the apparatus are television signals including a synchronization signal, and the timing of appearance of the synchronization signal is the same outside the apparatus so that the reception data 110A and 110B have the same timing. Is controlled. The frame detectors 101A and 101B detect a frame (synchronization) such as a vertical drive pulse of received data, and notify the switches 102A and 102B, respectively. This frame
It indicates the beginning of data constituting the screen of the television. The control unit 103 receives a data switching instruction from the outside,
An ON instruction is issued to one of the switches 102A and 102B, and an OFF instruction is issued to all others. The switches 102A and 102B switch the switches according to the instruction of the control unit 103, and the timing is the timing of the frame reception notification from the frame detectors 101A and 101B. Since the frames of the plurality of received data 110A and 110B are all synchronized, the frame detector 10
The timings notified from 1A and 101B are all the same. Therefore, the switches 102A and 102B are simultaneously switched. At this time, only one switch is turned on, and all others are turned off.

In this way, the present apparatus always selects one from a plurality of received data. In FIG. 11, received data 101A and 101B and switches 102A and 102B
And the like are shown only for the sake of explanation, but there may actually be a plurality of pairs. Switches 102A, 102B
Is switched at the beginning of a frame when data to be selected is switched, so that a data frame near the switching is always held. As a result, the data switched by this device is maintained in the same state as in the case where switching is not performed, without adversely affecting the image at the time of switching (image disturbance (noise) or loss of frame synchronization).

As described above, in the conventional switching device, all data frames received by an externally applied clock need to be matched for each frame, and the frame periods of all received data need to be the same. As a result, there is a problem that data that has been subjected to compression encoding cannot be treated as received data.

[0007] Japanese Patent Application Laid-Open No. Hei 8-223582 discloses a conventional data transmitting apparatus for switching compression-encoded data. That is, in FIG. 12, the image system 1 is a system used for image editing in a broadcast station, for example.
The compressed image data output from the image processing devices 201 to 20n is input to the switcher 24 via the router 22 in synchronization with the GOP clock signal GOPCK generated by the GOPG circuit 10, and the switcher 24 outputs the compressed image data. Is selected and input to the decoding device 28, and the decoding device 28 decodes the input compressed image data and outputs it as output video data.

Next, the operation will be described. In the description, the GOP (Group Of Pict) used as a processing unit
ure) is composed of only an intra-coded image (I frame) that can be decoded independently, and a forward prediction image (P) that can be decoded using data obtained by decoding a temporally earlier frame. Frame) and an I-frame, and a bidirectional predicted image (B-frame) that can be decoded using decoded data of frames that are temporally preceding and succeeding.
And an I frame, or an I frame, a P frame and a B frame. The GOPG circuit 10 includes the image processing system 1
A GOPCK signal defining the input / output timing of the compressed image data of each component in GOP units is generated and output to each component of the image processing system 1. The image processing devices 201 to 20n are, for example, a compressed image recording device and a predictive encoding device, and compress in GOP units in synchronization with the GOPCK signal generated by the GOPG circuit 10 according to the control of the editor 26 via the control signal C20. The image data is input to the input terminals VIN1 to VINn of the router 22, respectively.
(N is an integer).

In accordance with the control of the editor 26 via the control signal C22, the router 22 synchronizes with the GOPCK signal from the image processing devices 201 to 20n to the input terminal VIN1.
ＮVINn are routed to arbitrary output terminals VOUT1 to VOUTm (m is an integer) and output to the switcher 24. The switcher 24 responds to the signal of the editor 26 via the control signal C24 (switching signal) by the router 22.
To select one of the compressed image data output from the output terminals VOUT1 to VOUTm.
Is output to the router 22. The compressed image data S24 input again from the switcher 24 to the router 22
Are again routed by the router 22 and output as compressed image data S22 to the decoding device 28, for example.

The decoding device 28 decodes the compressed image data input from the router 22 according to the control of the editor 26 via the control signal C28, and outputs it as an output video signal S28. The editor 26 is, for example, an editing device used for image editing processing, and controls each component of the image processing system 1 in accordance with operation information input from the control panel 260 by an editor. That is, the editor 26 outputs the compressed image data output from any one of the image processing devices 201 to 20n to the decoding device 28 via the router 22 and the switcher 24. Each component of the image processing system 1 is controlled so as to obtain a desired video signal S28.

[0011]

As described above, in the conventional data transmitting apparatus, the image processing device uses the data coded in GOP units in advance and synchronizes the GOP timing signals with the GOP timing signals. Can be switched in GOP units. Therefore, since only fixed-length data that has been encoded in a timely manner can be handled, the encoding amount in GOP units cannot be changed in real time, and image distortion may occur on the decoding side. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and even if coded data whose coding amount can be changed in real time in a predetermined coding unit is switched, the decoding side can be changed. It is an object of the present invention to reduce the disturbance of the image.

[0013]

In order to solve the above-mentioned problems, a data transmitting apparatus according to the present invention uses an encoding method including variable-length encoding of one or a plurality of input image data in a predetermined encoding unit. One of the coded data that has been coded and coded is switched in the predetermined coding unit according to a predetermined switching signal. further,
A timing signal of a predetermined coding unit is generated, and coding is performed in a predetermined coding unit in synchronization with the timing signal. Further, a timing signal of a predetermined coding unit is generated, and the coding is performed in a predetermined coding unit in synchronization with the timing signal, and switching is performed. Further, a coding amount control signal for controlling the coding amount is generated, and based on the coding amount control signal, coding is performed in a predetermined coding unit in synchronization with a timing signal. Furthermore, a switching signal is generated, and a plurality of encoded data are switched according to the switching signal and the timing signal. Further, a plurality of coded data input by the plurality of image switching means are respectively switched, and a plurality of coded data are transmitted. In addition, a plurality of encoded data are output by switching a plurality of encoded data in predetermined coding units in accordance with a switching signal by a plurality of image switching units. In addition, a plurality of encoded data are switched according to a switching signal to output a plurality of encoded data. Further, a predetermined coding unit is detected from the coded data, and the switching timing is determined. Further, a plurality of encoded data items are multiplexed, and the multiplexed data is switched according to a predetermined switching signal.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a block diagram showing a data transmitting apparatus according to an embodiment of the present invention. In the figure, 11-1N encodes GOP-unit image data G1-GN composed of an I-frame, a combination of an I-frame and a P-frame, or a combination of an I-frame, a P-frame and a B-frame. Image encoding means for generating the signals P1 to PN; switching signal generating means for generating a switching signal S3 for instructing selection and switching of the encoded image signals P1 to PN;
3 is an encoded image signal P from the image encoding means 11 to 1N
1 to PN, the switching signal S3 generated by the switching signal generating means 2.
And an image switching means 4 for selecting and outputting the encoded image data S5. The image switching means 4 outputs the image encoding timing signal C1 and the GOP unit for the image encoding GOP unit to the image encoding units 11-1N and the image switching unit 3. GOP timing generating means 5 for generating the image switching timing signal C2 of FIG. 1 is a code amount control means for generating a code amount control signal S4 for the image encoding means 11-1N and the GOP timing generating means 4.

Next, the operation will be described. First, in the image encoding means 11-1N, the input image data G1-GN
Is the code control signal S generated in the code amount control means 5.
4 is encoded and GOP timing generating means 4
The coded image signals P1 to PN are generated in synchronization with the GOP-unit image coding timing signal C1 generated in. Next, the generated coded image signals P1 to PN are respectively input to the image switching means 3, and based on the switching signal S3 generated by the switching signal generation means 2, the image switching timing in GOP units generated by the GOP timing generation means 4 One of the encoded image signals P1 to PN is selected in synchronization with the signal C2, and is output as encoded image data S5.

At this time, the coding amount control means 5 controls the GOP coding amount in the image coding means 11 to 1N via the code amount control signal S4, and also controls the GOP timing Control signal C1 and the image switching timing signal C2.

Hereinafter, the image encoding means 11 will be described with reference to FIG.
In the following, an example will be described in which the coded image data output from the image switching unit 12 is switched by the image switching unit 3 by the image switching signal S3 generated by the switching signal generation unit 2. 2A and 2B are timing charts showing the operation of the data transmission system shown in FIG. 1. FIG. 2A shows the waveform of the image switching timing signal C2 in GOP units generated by the GOP timing generation means 4, and FIG. 5 shows a GOP of the encoded image signal P1 generated by the image encoding means 11,
(C) shows the GOP of the encoded image signal P2 generated by the image encoding means 12, (D) shows the waveform of the image switching signal S3 generated by the switching signal generation means 2, and (E) shows the image switching. G of the encoded image data S5 output from the means 3
Indicates OP.

GO of encoded image signal P1 and input P2
P is formed by GOP signals GOP_11 to GOP_13 and GOP_21 to G23 synchronized with the GOP-unit image switching timing signal C2 shown in FIG. Synchronization widths T1 to T of timing signals in image switching timing signal C2
3 can be changed in real time by an encoding control signal S4 from the code amount control means 5.

At time a, the GOP of the encoded image signal P1 shown in FIG. 2B is output as the encoded image data S5 of the image switching means 3. At time b, assuming that the image switching signal S3 is generated from the switching signal generating means 2, time c, which is the switching timing in GOP units immediately after,
In, the encoded image data S5 selected by the image switching means 3 is switched from P1 to P2. Eventually, the GOPs selected by the image switching means 3 are GOP_11, GOP_1
2, GOP_23.

In the code amount control unit 5, the GOP
Code amount control signal S4 for changing the coding amount in units
Is transmitted to the image coding units 11 and 12, and the image coding units 11 and 12 change the coding amount in GOP units based on the code amount control signal S4. D1 in FIG. 2 is a GOP signal G encoded by the image encoding means 11.
The data amount in OP_11, D2 is the GOP signal GOP
_12, the data amount D3 is the GOP signal GOP_1
3 shows the data amount, but as shown in FIG.
2, or the GOP data amount can be changed from D2 to D3.

As described above, based on the coding control signal from the coding amount control means, while controlling the coding amount of each image coding means in real time, each image code is controlled in accordance with the timing of the GOP timing generation means. Since the encoding means and the image switching means are synchronized, any one of the encoded image signals output from each of the image encoding means can be switched in GOP units as encoded image data, and the output from the image encoding means can be switched. The image is not interrupted even when is switched. Further, even if the output of the image encoding unit selected by the image switching unit is interrupted, it is possible to immediately switch to the output of another image encoding unit, and no image disturbance occurs on the decoding side. Here, the image encoding unit and the image switching unit are synchronized in accordance with the timing generated by the GOP timing generation unit, but the switching may be performed in accordance with the encoding timing in the image encoding unit.

Embodiment 2 FIG. FIG. 3 is a block diagram showing a configuration using a plurality of image switching units and a plurality of switching signal generation units. The image switching units 3A and 3B receive the encoded image signals P1 and P2 generated by the image encoding units 11 and 12, respectively, as input, and a switching signal S3A generated from the switching signal generation units 2A and 2B.
And S3B, the GOP unit image switching timing signal C generated by the GOP timing generation means 4
2, the input coded image data is selected and switched, and the coded image data S5A and S5B are output.

According to this embodiment, a plurality of encoded data can be output in response to a plurality of image data inputs, and an image switching signal can be independently generated. As described above, since a plurality of image switching units and a plurality of switching signal generation units are provided, each of the plurality of image switching units is selectively switched when any one of the plurality of encoded image signals output from each image encoding unit is selectively output. Either of the encoded image signals output from each image encoding means can be switched as encoded image data in GOP units for each means and for each switching signal, and different selections can be made by each image switching means. It is possible to output different encoded image data.

Embodiment 3 FIG. FIG. 4 is a block diagram showing a case where a plurality of encoded data are output by a plurality of image switching means and a single switching signal generating means. The image switching units 3A and 3B are respectively provided with image encoding units 11
And 12, the coded image signals P1 and P2 generated as inputs are inputted, and based on the switching signals S3A and S3B generated from the switching signal generating means 2, the GOP timing generating means 4 generates a GOP unit image switching timing signal C2. The input coded image data is selected and switched in synchronization with the coded image data S5A and S5.
B is output.

According to this embodiment, a plurality of images can be switched with a single switching signal for a plurality of image switching means and a single switching signal generating means. As mentioned above,
Since a plurality of image switching units and a single switching signal generating unit are provided, when outputting any of the encoded image signals output from each image encoding unit, each image is output by a single switching signal. Any one of the encoded image signals output from each image encoding unit can be switched as encoded image data in GOP units for each switching unit, and different selections can be made simultaneously by each image switching unit at the timing of the switching signal. That is, different encoded image data can be output simultaneously at the timing of the switching signal.

Embodiment 4 FIG. 5 is a block diagram showing a case where a plurality of encoded data are output by a single image switching unit and a single switching signal generating unit. The image switching means 3 receives the coded image signals P1 and P2 generated by the image coding means 11 and 12 as inputs, and generates G based on a switching signal S3 generated from the switching signal generating means 2.
The input coded image data is selected and switched in synchronization with the GOP unit image switching timing signal C2 generated in the OP timing generation means 4, and the coded image data S
5A and 5B are output.

FIG. 6 is a timing chart showing the operation of the data transmission system shown in FIG.
7B shows the waveform of the image switching timing signal C2 in GOP units generated by the P timing generation unit 4; FIG. 7B shows the GOP of the encoded image signal P1 generated by the image encoding unit 11;
(C) shows the GOP of the coded image signal P2 generated by the image coding unit 12, (D) shows the waveform of the image switching signal S3 generated by the switching signal generation unit 2,
(E) shows the GOP of the encoded image data S5A output from the image switching means 3, and (F) shows the GOP of the encoded image data S5B output from the image switching means 3.

At time a, the GOP of the encoded image signal P1 shown in (B) is output as the encoded image data S5A of the image switching means 3, and the GOP of the encoded image signal P2 is output.
OP is output as encoded image data S5B.
Assuming that the image switching signal S3 is generated from the switching signal generating means 2 at time b, the coded image data S5A selected by the image switching means 3 at time c, which is the switching timing in GOP units immediately after, is changed from P1 to P2. Can be switched to At the same time, the encoded image data S5B changes from P2 to P
Switched to 1.

According to this embodiment, it is possible to switch a plurality of images with a single switching signal for a single image switching unit and a single switching signal generating unit. As mentioned above,
Since a single image switching unit and a single switching signal generating unit are provided, when a plurality of encoded image signals output from each image encoding unit are selectively output, a single switching signal is used. , Can be switched in units of GOP as encoded image data, and the encoded image data selected by the image switching means can be switched at the timing of the switching signal.

In the first to fourth embodiments, the image switching means switches images in synchronization with the GOP timing signal generated by the GOP timing generation means. Next, an embodiment in which the image switching means performs switching by detecting the GOP header of the encoded image data generated by the image encoding means will be described.

Embodiment 5 FIG.
P timing generation means 4 performs GO to image switching means 3
FIG. 9 is a block diagram in a case where an image switching timing signal C2 in P units is not transmitted. The image switching means 3 has a buffer 301 for recording encoded data in stream packet units. 8A and 8B are timing charts showing the operation of the data transmission system shown in FIG. 7, wherein FIG. 8A shows the waveform of the GOP unit image encoding timing signal C1 generated by the GOP timing generation means 4, and FIG. Indicates a GOP of the encoded image signal P1 generated by the image encoding unit 11, and FIG.
2 shows a GOP of the encoded image signal P2 generated in
(D) shows the waveform of the image switching signal S3 generated by the switching signal generating means 2, and (E) shows the GOP of the encoded image data S5 output from the image switching means 3.

GO of coded image signal P1 and input P2
P is formed by GOP signals GOP_11 to GOP_13 and GOP_21 to G23 which are synchronized with the GOP-unit image coding timing signal C1 shown in FIG. However, GO
In the process of forming P, there may be a case where the timing of each GOP slightly shifts as shown in the figure.

At time a, if the image switching signal S3 is generated by the switching signal generating means 2, the image switching means starts detecting the GOP header immediately afterward, and at time b1, the GOP header is detected.
At time b2 of OP_23, the GOP header of GOP_13 is detected. From time b1 to time b2, the image switching means 3 stores GOP_
23 stream packets are recorded. G at time b2
When the GOP header of OP_13 is detected, the time is set to G
Assuming that the time c is the switching timing in OP units, the coded image signal selected by the image switching means 3 is P1
To P2. After all, the GOPs selected by the image switching means 3 are GOP_11, GOP_12, GOP
_23. It should be noted that the encoded data after GOP_23 is delayed in units of stream packets. According to this embodiment, the image switching means
It is possible to switch coded data in GOP units without synchronizing with the image switching timing signal in OP units.

As described above, based on the coding control signal from the coding amount control means, while controlling the coding amount of each image coding means in real time, each image code is synchronized with the timing of the GOP timing generation means. Encoding is performed in synchronization with the encoding unit, and the image switching unit detects the GOP header of the encoded image data generated by the image encoding unit, and selects one of the encoded image signals output from each image encoding unit. Can be switched in GOP units as encoded image data, and the image is not interrupted even when the output from the image encoding means is switched. Further, even if the output of the image encoding unit selected by the image switching unit is interrupted, it is possible to immediately switch to the output of another image encoding unit, and no image disturbance occurs on the decoding side.

In the first to fifth embodiments, the coded data coded by the image coding means is directly switched by the image switching means. Next, an embodiment in which multiplexed data in which a plurality of encoded data are multiplexed is switched by an image switching unit will be described.

Embodiment 6 FIG. FIG. 9 shows an example in which the number of image encoding means in FIG.
Multiplexing means 6A for multiplexing the coded image signals P1A and P1B generated in 1A and 11B on a GOP basis,
And multiplexing means 6B for multiplexing the encoded data P2A and P2B generated by the image encoding means 12A and 12B on a GOP basis.
The multiplexed data S6A and S6B multiplexed in the step S1 are input to the image switching means 3, and the image switching means 3 selects the multiplexed data S6A or S6B and outputs the multiplexed data S7.
Output as The GOP timing generators 4A and 4B generate GOP unit image encoding timing signals C1A and C1B for the image encoding units 11A and 12A and the image encoding units 11B and 12B, respectively. The code amount control means 5 generates a code amount control signal S4 for the image coding means 11 to 14 and the GOP timing generation means 4A and 4B.

FIG. 10 is a timing chart showing the operation of the data transmission system shown in FIG. 9, wherein (A) shows the GOP of the multiplexed coded image signal S6A generated by the multiplexing means 6A, and (B) Shows the GOP of the multiplexed coded image signal S6B generated by the multiplexing means 6B, (C) shows the waveform of the image switching signal S3 generated by the switching signal generating means 2, and (D) shows the waveform of the image switching signal S3. 8 shows a GOP of the output multiplexed data S7.

At time a, the GOP of the coded image signal S6A shown in (A) is output as the multiplexed coded data S7 of the image switching means 3. At time b, the switching signal generator 2 outputs P1A and P2 of the multiplexed image.
Assuming that the image switching signal S3 for the A side is generated, the coded image data selected by the image switching means 3 at the time c which is the switching timing in the GOP unit of the P1A and the P2A immediately after is the multiplexed coded signal of the S6A. To S6B
Is switched to the multiple coded signal. At time d, the switching signal generating means 2 outputs P1B
If the image switching signal S3 for the P2B side is generated, the coded image data selected by the image switching means 3 at the time e, which is the switching timing in units of GOP on the P1B and P2B sides immediately after, is multiplexed by S6A. The signal is switched to the multiplexed coded signal of S6B. After all, the GOP selected by the image switching means 3 is GOP_11A,
GOP — 11B, GOP — 22A, GOP — 12B, G
The order is OP_23A, GOP_23B. According to this embodiment, it is possible to switch coded data in GOP units even for multiplexed coded data in GOP units.

As described above, based on the coding control signal from the coding amount control means, while controlling the coding amount of each picture coding means in real time, each picture code is adjusted in accordance with the timing of the GOP timing generation means. Encoding is performed in synchronization with the multiplexing means, multiplexed by each multiplexing means, and one of the multiplexed data is output as a multiplexed coded signal. Arbitrary encoded image data that is a part of the signal can be switched in GOP units, and the image is not interrupted even when the output from the image encoding unit is switched. Further, even if the output of the image encoding unit selected by the image switching unit is interrupted, it is possible to immediately switch to the output of another image encoding unit, and no image disturbance occurs on the decoding side.

[0040]

Since the present invention is configured as described above, it has the following effects. A coding amount control signal for controlling the coding amount is generated, and based on the coding amount control signal, the image is encoded in a predetermined coding unit in synchronization with the timing signal while controlling the coding amount in real time. The image is not interrupted even if the image is switched. Further, even if the selected image is interrupted, it is possible to immediately switch to another image, and no image disturbance occurs on the decoding side.

[Brief description of the drawings]

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

FIG. 2 is a timing chart showing the operation of the data transmission system shown in FIG.

FIG. 3 is a block diagram showing a data transmitting apparatus having a plurality of switching means and switching signal generating means according to an embodiment of the present invention;

FIG. 4 is a block diagram showing a data transmitting apparatus having a plurality of switching units and a single switching signal generating unit and outputting a plurality of encoded data according to an embodiment of the present invention;

FIG. 5 is a block diagram showing a data transmitting apparatus according to an embodiment of the present invention, which outputs a plurality of encoded data.

FIG. 6 is a timing chart showing the operation of the data transmission system shown in FIG.

FIG. 7 is a block diagram showing a data transmitting apparatus for detecting a GOP header and switching encoded data according to an embodiment of the present invention;

8 is a timing chart showing the operation of the data transmission system shown in FIG.

FIG. 9 is a block diagram showing a data transmitting apparatus for switching multiplexed data obtained by multiplexing a plurality of encoded data according to an embodiment of the present invention;

10 is a timing chart showing the operation of the data transmission system shown in FIG.

FIG. 11 is a block diagram showing a conventional data transmission device.

FIG. 12 is a block diagram showing a conventional data transmission device.

[Explanation of symbols]

 11 to 1N are image coding means, 2 is switching signal generating means, 3 is image switching means, 4 is GOP timing generating means, 5 is code amount control means 6A and 6B are multiplexing means, and G1 to GN are image data P1 to P1. PN is a coded image signal S3 is a switching signal S4 is a code amount control signal S5 is coded image data S6A and S6B is multiplexed data S7 is multiplexed coded data C1 is a GOP unit image coding timing signal C2 is a GOP unit Image switching timing signal

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshiaki Kato 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 5C059 KK23 KK33 MA05 MC30 ME01 PP04 RB19 RC28 SS01 TA57 TB03 TB20 TC18 TC24 TD20 UA02 UA05 5C078 CA00 CA02 DA00 DA01 9A001 BZ04 EE01 EE04 HH27

Claims (10)

[Claims] 1. A plurality of image encoding means for encoding one or a plurality of input image data by an encoding method including a variable length encoding in a predetermined encoding unit; A data transmission device comprising: an image switching unit that switches any one of encoded data in a predetermined coding unit according to a predetermined switching signal. 2. The apparatus according to claim 1, further comprising timing generation means for generating a timing signal of a predetermined coding unit, wherein said image coding means performs coding in a predetermined coding unit in synchronization with the input timing signal. 2. The data transmission device according to claim 1, wherein: 3. A timing generating means for generating a timing signal of a predetermined coding unit, wherein said image coding means generates a timing signal in synchronism with a timing signal generated by said timing generating means in response to a predetermined switching signal. The data transmission apparatus according to claim 2, wherein the plurality of encoded data is switched in units of encoding. 4. An apparatus according to claim 1, further comprising: a coding amount control unit for generating a coding amount control signal for controlling a coding amount, based on said coding amount control signal, in synchronization with a timing signal generated by said timing generation unit. 4. The data transmitting apparatus according to claim 3, wherein the image encoding unit performs encoding in a predetermined encoding unit. 5. A switching signal generating means for generating a switching signal, wherein a plurality of encoded data encoded by the image encoding means are switched according to the timing signal and the switching signal. The data transmission device according to claim 4. 6. An image processing apparatus comprising: a plurality of image switching units to which a plurality of encoded data encoded by the image encoding unit are respectively input; By switching and sending,
5. The data transmitting apparatus according to claim 4, wherein a plurality of encoded data are output. 7. An image processing apparatus, comprising: one or more switching signal generating means for generating a switching signal for said plurality of image switching means; 7. The data transmitting apparatus according to claim 6, wherein the image switching unit outputs a plurality of encoded data by switching and outputting the encoded data in a predetermined coding unit according to the switching signal. 8. The apparatus according to claim 5, wherein said image switching means switches a plurality of encoded data encoded by said image encoding means in accordance with said switching signal and outputs as a plurality of encoded data. A data transmission device according to claim 1. 9. The apparatus according to claim 2, wherein said image switching means detects a predetermined coding unit from the coded data coded by the image coding means, and determines a switching timing. Data transmission device. 10. A plurality of multiplexing means for multiplexing a plurality of encoded data encoded by said image encoding means,
3. The data transmission device according to claim 2, wherein the multiplexed data output from the multiplexing unit is switched according to a predetermined switching signal.