JPH09116902A - Image transmitter - Google Patents

Image transmitter

Info

Publication number
JPH09116902A
JPH09116902A JP27327595A JP27327595A JPH09116902A JP H09116902 A JPH09116902 A JP H09116902A JP 27327595 A JP27327595 A JP 27327595A JP 27327595 A JP27327595 A JP 27327595A JP H09116902 A JPH09116902 A JP H09116902A
Authority
JP
Japan
Prior art keywords
image
section
image information
image storage
transmission
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP27327595A
Other languages
Japanese (ja)
Inventor
Hideki Matsuoka
秀樹 松岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu General Ltd
Original Assignee
Fujitsu General Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu General Ltd filed Critical Fujitsu General Ltd
Priority to JP27327595A priority Critical patent/JPH09116902A/en
Publication of JPH09116902A publication Critical patent/JPH09116902A/en
Pending legal-status Critical Current

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  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Television Systems (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a technology of increasing the transmission speed by minimizing the processing time when a still image is compressed and sent. SOLUTION: A video signal from a video camera 1 is received and compressed as a still image by a reception compression section 2, and an image input changeover section 3 controlled by a changeover control section 8 stores the result while selecting an image storage section 4 or 5 sequentially. An output changeover section 6 selects an output of the image storage section 5 or 4 opposite to the image storage section conducting write storage and sends it to a receiver side from a transmission section 7. An image changeover section 12 controlled by a circuit control section 18 selects an image storage section 13 or 14 sequentially to write and store the image information received by a reception section 11. An output changeover section 15 controlled by the changeover control section 18 selects an output of the image storage section 14 or 13 opposite to the image storage section during write and storage and transfers the output to an expansion section 16. The expansion section expands the image information and decodes the expanded original image and it is displayed on a display section 17.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、静止画情報を圧縮して
高速に伝送する、処理速度を改善した画像伝送装置に関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image transmission apparatus which improves the processing speed by compressing still image information and transmitting it at high speed.

【0002】[0002]

【従来の技術】図3は、従来の画像伝送装置の1例の
(A)送信側、(B)受信側のブロック図である。送信
側では、ビデオカメラ31で撮影した映像信号を取込圧
縮部32で静止画像として取り込こみ、情報圧縮してバ
ッファとなる画像記憶部33を介して伝送部34から受
信側に伝送する。受信側では受信部35で受けた画像情
報をバッファとなる画像記憶部36を介して伸張部37
で原画像を伸張復元し、表示部38に表示する。このよ
うな装置では、図4の(A)送信側、(B)受信側のタ
イミング図に示すように送信側では画像取込圧縮時41
と送信時42が直列となるため、全体の処理時間が長く
なるという問題がある。同様に、受信側では、受信時4
3と伸張復元時44が直列となり、処理時間を要する。
2. Description of the Related Art FIG. 3 is a block diagram of an example of a conventional image transmission device, (A) transmitting side and (B) receiving side. On the transmission side, the video signal captured by the video camera 31 is captured by the capture compression section 32 as a still image, and the information is compressed and transmitted from the transmission section 34 to the reception side via the image storage section 33 serving as a buffer. On the receiving side, the image information received by the receiving unit 35 is expanded via the image storage unit 36 serving as a buffer and the decompressing unit 37.
The original image is decompressed and restored by and displayed on the display unit 38. In such an apparatus, as shown in the timing chart of (A) transmission side and (B) reception side of FIG.
Since the transmission time 42 is serially connected, there is a problem that the entire processing time becomes long. Similarly, on the receiving side, when receiving
3 and 44 at the time of decompression and restoration are in series, which requires processing time.

【0003】[0003]

【発明が解決しようとする課題】本発明は、上記問題点
に鑑みなされたもので、静止画像を圧縮して伝送すると
きの処理時間を最小にして、伝送速度を上げる技術を提
供することにある。
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a technique for increasing the transmission speed by minimizing the processing time when compressing and transmitting a still image. is there.

【0004】[0004]

【課題を解決するための手段】送信側に画像情報を記憶
する2つの画像記憶部と、同2つの画像記憶部の入力を
切り換える画像入力切換部と、同2つの画像記憶部の出
力を切り換える画像出力切換部と、同画像入力切換部と
画像出力切換部の切換時を制御する切換制御部を設け、
送信する画像情報と取込圧縮する画像情報を前記2つの
画像記憶部に順次切り換えて記憶する。
Means for Solving the Problems Two image storage units for storing image information on a transmission side, an image input switching unit for switching inputs of the two image storage units, and switching of outputs of the two image storage units. An image output switching unit, a switching control unit for controlling switching between the image input switching unit and the image output switching unit are provided,
Image information to be transmitted and image information to be captured and compressed are sequentially switched and stored in the two image storage units.

【0005】1つの画像の取込圧縮時間は伝送時間より
短いものとし、取込圧縮の終了時と伝送の終了時を略同
時とする。
The capture compression time of one image is shorter than the transmission time, and the end time of the capture compression and the end time of the transmission are substantially the same.

【0006】受信側に画像情報を記憶する2つの画像記
憶部と、同2つの画像記憶部の入力を切り換える画像入
力切換部と、同2つの画像記憶部の出力を切り換える画
像出力切換部と、同画像入力切換部と画像出力切換部の
切換時を制御する切換制御部を設け、受信した画像情報
と伸張表示する画像情報を前記2つの画像記憶部に順次
切り換えて記憶する。
Two image storage units for storing image information on the receiving side, an image input switching unit for switching inputs of the two image storage units, and an image output switching unit for switching outputs of the two image storage units. A switching control unit for controlling switching between the image input switching unit and the image output switching unit is provided, and the received image information and the image information to be expanded and displayed are sequentially switched and stored in the two image storage units.

【0007】伸張表示は1つの画像情報を受信終了時と
を略同時に開始する。
Decompression display starts at the end of reception of one image information at substantially the same time.

【0008】送信側では、送信する画像情報と取込圧縮
する画像情報を送信側の前記2つの画像記憶部に順次切
り換えて記憶するとともに、受信側では、受信した画像
情報と伸張表示する画像情報を受信側の前記2つの画像
記憶部に順次切り換えて記憶する。
On the transmitting side, the image information to be transmitted and the image information to be captured and compressed are sequentially switched and stored in the two image storage units on the transmitting side, and on the receiving side, the received image information and the image information to be expanded and displayed. Are sequentially switched to and stored in the two image storage units on the receiving side.

【0009】[0009]

【作用】送信部側に画像情報を記憶する2つの画像記憶
部と、同2つの画像記憶部の入力を切り換える画像入力
切換部と、同2つの画像記憶部の出力を切り換える画像
出力切換部と、同画像入力切換部と画像出力切換部の切
換時を制御する切換制御部を設け、送信する画像情報と
取込圧縮する画像情報を前記2つの画像記憶部に順次切
り換えて記憶することで、送信する画像情報の取込圧縮
と送信とが同時に処理できる。
Operation: Two image storage units for storing image information on the transmission unit side, an image input switching unit for switching inputs of the two image storage units, and an image output switching unit for switching outputs of the two image storage units. By providing a switching control unit for controlling switching between the image input switching unit and the image output switching unit, and sequentially switching and storing image information to be transmitted and image information to be captured and compressed in the two image storage units, Capturing and compressing image information to be sent and sending can be processed simultaneously.

【0010】1つの画像の取込圧縮時間は伝送時間より
短いものとし、取込圧縮の終了時と伝送の終了時を略同
時とすることで、送信側での画像情報の取込圧縮から送
信までの遅れ時間が最短となる。
It is assumed that the time for capturing and compressing one image is shorter than the transmission time, and the end of the capturing compression and the end of the transmission are made substantially at the same time so that the transmitting side can transfer the image information from the receiving compression. The delay time to becomes the shortest.

【0011】受信側に画像情報を記憶する2つの画像記
憶部と、同2つの画像記憶部の入力を切り換える画像入
力切換部と、同2つの画像記憶部の出力を切り換える画
像出力切換部と、同画像入力切換部と画像出力切換部の
切換時を制御する切換制御部を設け、受信した画像情報
と伸張表示する画像情報を前記2つの画像記憶部に順次
切り換えて記憶することで、画像情報の受信と伸張とを
同時に処理できる。
Two image storage units for storing image information on the receiving side, an image input switching unit for switching inputs of the two image storage units, and an image output switching unit for switching outputs of the two image storage units, A switching control unit for controlling switching between the image input switching unit and the image output switching unit is provided, and the received image information and the image information to be expanded and displayed are sequentially switched and stored in the two image storage units. Can receive and decompress simultaneously.

【0012】伸張表示は1つの画像情報を受信終了時と
略同時に開始することで、受信側で画像情報を受信して
から伸張して表示するまでの遅れ時間が最短となる。
The decompression display starts one image information at almost the same time as the reception end, so that the delay time from the reception of the image information to the decompression and display is minimized.

【0013】送信側では、送信する画像情報と取込圧縮
する画像情報を送信側の前記2つの画像記憶部に順次切
り換えて記憶するとともに、受信側では、受信した画像
情報と伸張表示する画像情報を受信側の前記2つの画像
記憶部に順次切り換えて記憶することで、送信する画像
情報の取込圧縮と送信とが同時に処理できるとともに、
画像情報の受信と伸張も同時に処理できる。
On the transmitting side, the image information to be transmitted and the image information to be captured / compressed are sequentially switched and stored in the two image storage sections on the transmitting side, and on the receiving side, the received image information and the image information to be expanded and displayed. Is sequentially switched to and stored in the two image storage units on the receiving side, the image data to be transmitted can be simultaneously compressed and transmitted, and at the same time,
Image information reception and decompression can be processed simultaneously.

【0014】[0014]

【実施例】以下、本発明による画像伝送装置について図
を用いて詳細に説明する。図1は本発明による画像伝送
装置の(A)送信側、(B)受信側のブロック図であ
る。送信側では、ビデオカメラ1で撮影した映像から取
込圧縮部2で静止画像として画像情報を取り込んで情報
圧縮し、切換制御部8で制御する画像入力切換部3で画
像記憶部4、又は、5のいずれかに順次切り換えて書き
込み記憶する。また、切換制御部8で制御される出力切
換部6で、書き込み記憶中の画像記憶部と反対の画像記
憶部5、又は、4の出力を選択して送信部7から受信側
に送信する。同様に受信側では受信部11で受けた画像
情報を、切換制御部18で制御する画像入力切換部12
で画像記憶部13、又は、14に順次切り換えて書き込
み記憶する。切換制御部18で制御する出力切換部15
では、書き込み記憶中の画像記憶部と反対の画像記憶部
14、又は、13の出力を選択して伸張部16に転送す
る。伸張部16で画像情報を伸張して原画像を復元し、
表示部17に表示する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An image transmission device according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of (A) transmission side and (B) reception side of an image transmission apparatus according to the present invention. On the transmission side, the capturing compression unit 2 captures image information as a still image from the image captured by the video camera 1 and compresses the information, and the switching control unit 8 controls the image input switching unit 3 to store the image information in the image storage unit 4 or 5 is sequentially switched to write and store. In addition, the output switching unit 6 controlled by the switching control unit 8 selects the output of the image storage unit 5 or 4 opposite to the image storage unit in which writing is being stored, and transmits the output from the transmission unit 7 to the reception side. Similarly, on the receiving side, the image input switching unit 12 that controls the image information received by the receiving unit 11 by the switching control unit 18
Then, the image is stored in the image storage unit 13 or 14 by sequentially switching to the image storage unit 13 or 14. Output switching unit 15 controlled by switching control unit 18
Then, the output of the image storage unit 14 or 13 opposite to the image storage unit in which writing and storage is performed is selected and transferred to the decompression unit 16. The decompression unit 16 decompresses the image information to restore the original image,
It is displayed on the display unit 17.

【0015】図2は、本発明による画像伝送装置の1実
施例の(A)送信側、(B)受信側のタイミング図であ
る。上記のように送信側においては、画像情報の取込圧
縮のとき使用する画像記憶部と、送信のとき使用する画
像記憶部が別々に選択できるので、取込圧縮時21と送
信時22が並列になるように処理することができる。ま
た、一般に送信時22より取込圧縮時21が短くできる
が、その場合に、上記の切換制御部8で画像入力切換部
4と画像出力切換部6の切換タイミングを制御して、取
込圧縮時21と送信時22とが同時に略終了するように
制御することもできる。すなわち、次の送信時の開始時
の直前に取込圧縮が終了し、次の送信時に送信できるよ
うにする。同様に、受信側においては、画像情報の受信
のときに使用する画像記憶部と、伸張復元のとき使用す
る画像記憶部が別々に選択できるので、受信に要する時
間23と伸張に要する時間24が並列になるように処理
することができる。また、一般に受信時22より伸張時
24が短くできるが、その場合に、上記切換制御部18
で画像入力切換部12と画像出力切換部15の切換タイ
ミングを制御して、受信時間23の終了と同時に伸張2
2を開始するように制御することもできる。
FIG. 2 is a timing diagram of (A) transmission side and (B) reception side of an embodiment of the image transmission apparatus according to the present invention. As described above, on the transmission side, the image storage unit used when capturing and compressing image information and the image storage unit used when transmitting can be selected separately. Can be processed to. Further, in general, the time of capture compression 21 can be made shorter than the time of transmission 22. In that case, the switching timing of the image input switching unit 4 and the image output switching unit 6 is controlled by the switching control unit 8 to capture the compressed data. It is also possible to control so that the time 21 and the transmission time 22 end substantially at the same time. That is, the capture compression ends immediately before the start of the next transmission, and the data can be transmitted at the next transmission. Similarly, on the receiving side, the image storage unit used when receiving image information and the image storage unit used when decompressing and restoring can be selected separately, so that the time 23 required for reception and the time 24 required for decompression are It can be processed in parallel. In general, the extension 24 can be made shorter than the reception 22. In that case, the switching control unit 18 can be used.
Controls the switching timing of the image input switching unit 12 and the image output switching unit 15 so that the expansion 2 is performed at the same time when the reception time 23 ends.
It can also be controlled to start 2.

【0016】[0016]

【発明の効果】以上説明してように、複数の静止画の画
像情報を順次取込圧縮して伝送する送信側と、同伝送さ
れた画像情報を順次伸張して原画像を復元して表示する
受信側からなる静止画伝送装置において、送信する画像
情報と取込圧縮する画像情報を2つの画像記憶部に順次
切り換えて記憶する等で、画像情報の伝送処理速度が向
上し、画像伝送速度の高速化を図ることができる。例え
ば、本発明を1Mbpsの無線伝送路に適用した場合を
考える。320×240画素からなる画像信号を輝度信
号と色信号の帯域比を4:2:2とし、各信号を8ビッ
トで量子化した場合は、1枚の画像の情報量は1.22
88Mbitとなり、これをJPEGで1/10に圧縮
して伝送するとすると毎秒約8枚の伝送が可能となる。
これに対して従来方式では、画像取込に約30ms、圧
縮に30ms、伝送に123msとして、総計で約18
3msを要し毎秒約5枚程度の伝送となる。
As described above, the transmitting side that sequentially captures and compresses and transmits the image information of a plurality of still images, and the transmitted image information is sequentially expanded to restore and display the original image. In the still image transmission device including the receiving side, the image information to be transmitted and the image information to be captured and compressed are sequentially switched and stored in two image storage units, so that the image information transmission processing speed is improved and the image transmission speed is increased. Can be speeded up. For example, consider a case where the present invention is applied to a 1 Mbps wireless transmission path. When an image signal composed of 320 × 240 pixels has a band ratio of a luminance signal and a color signal of 4: 2: 2 and each signal is quantized by 8 bits, the information amount of one image is 1.22.
It becomes 88 Mbit, and if it is compressed to 1/10 by JPEG and transmitted, about 8 sheets can be transmitted per second.
On the other hand, in the conventional method, about 30 ms for image acquisition, 30 ms for compression, and 123 ms for transmission, the total is about 18 ms.
It takes about 3 ms and the transmission is about 5 sheets per second.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明による画像伝送装置の(A)送信側、
(B)受信側のブロック図である。
FIG. 1A is a transmission side of an image transmission device according to the present invention,
(B) It is a block diagram of a receiving side.

【図2】本発明による画像伝送装置の1実施例の(A)
送信側、(B)受信側のタイミング図である。
FIG. 2 (A) of an embodiment of an image transmission device according to the present invention.
It is a timing diagram of a transmission side and (B) a reception side.

【図3】従来の画像伝送装置の1例の(A)送信側、
(B)受信側のブロック図である。
FIG. 3 is a (A) transmission side of an example of a conventional image transmission device,
(B) It is a block diagram of a receiving side.

【図4】従来の画像伝送装置の1例の(A)送信側、
(B)受信側のタイミング図である。
FIG. 4 is a (A) transmission side of an example of a conventional image transmission device,
(B) is a timing chart on the receiving side.

【符号の説明】[Explanation of symbols]

1 ビデオカメラ 2 取込圧縮部 3 画像入力切換部 4 画像記憶部 5 画像記憶部 6 画像出力切換部 7 伝像部 8 切換制御部 11 受信部 12 画像入力切換部 13 画像記憶部 14 画像記憶部 15 画像出力切換部 16 伸張部 17 表示部 18 切換制御部 21 取込圧縮時 22 送信時 31 ビデオカメラ 32 取込圧縮部 33 画像記憶部 34 伝送部 35 受信部 36 画像記憶部 37 伸張部 38 表示部 41 取込圧縮時 42 送信時 43 受信時 44 伸張時 DESCRIPTION OF SYMBOLS 1 Video camera 2 Capture compression section 3 Image input switching section 4 Image storage section 5 Image storage section 6 Image output switching section 7 Image transmission section 8 Switching control section 11 Receiving section 12 Image input switching section 13 Image storage section 14 Image storage section 15 image output switching unit 16 decompression unit 17 display unit 18 switching control unit 21 capture compression 22 transmission 31 video camera 32 capture compression unit 33 image storage unit 34 transmission unit 35 reception unit 36 image storage unit 37 decompression unit 38 display Part 41 When compressing 42 When sending 43 When receiving 44 When expanding

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 複数の静止画の画像情報を順次取込圧縮
して伝送する送信側と、同伝送された画像情報を順次伸
張して原画像を復元して表示する受信側からなる静止画
伝送装置において、前記送信側に画像情報を記憶する2
つの画像記憶部と、同2つの画像記憶部の入力を切り換
える画像入力切換部と、同2つの画像記憶部の出力を切
り換える画像出力切換部と、同画像入力切換部と画像出
力切換部の切換時を制御する切換制御部を設け、送信す
る画像情報と取込圧縮する画像情報を前記2つの画像記
憶部に順次切り換えて記憶することを特徴とした画像伝
送装置。
1. A still image comprising a transmitting side for sequentially capturing and compressing image information of a plurality of still images, and a receiving side for decompressing the transmitted image information to restore and display an original image. In the transmission device, the image information is stored in the transmission side 2
Image storage unit, an image input switching unit that switches inputs of the two image storage units, an image output switching unit that switches outputs of the two image storage units, and switching of the image input switching unit and the image output switching unit An image transmission device, characterized in that a switching control unit for controlling time is provided, and image information to be transmitted and image information to be captured and compressed are sequentially switched and stored in the two image storage units.
【請求項2】 1つの画像の取込圧縮時間は伝送時間よ
り短いものとし、取込圧縮の終了時と伝送の終了時を略
同時とすることを特徴とした請求項1記載の画像伝送装
置。
2. The image transmission device according to claim 1, wherein the capture compression time of one image is shorter than the transmission time, and the end time of the capture compression and the end time of the transmission are substantially the same. .
【請求項3】 前記受信側に画像情報を記憶する2つの
画像記憶部と、同2つの画像記憶部の入力を切り換える
画像入力切換部と、同2つの画像記憶部の出力を切り換
える画像出力切換部と、同画像入力切換部と画像出力切
換部の切換時を制御する切換制御部を設け、受信した画
像情報と伸張表示する画像情報を前記2つの画像記憶部
に順次切り換えて記憶することを特徴とした請求項1記
載の画像伝送装置。
3. The two image storage units for storing image information on the receiving side, the image input switching unit for switching the inputs of the two image storage units, and the image output switching for switching the outputs of the two image storage units. And a switching control unit for controlling the switching of the image input switching unit and the image output switching unit, and sequentially stores the received image information and the image information to be expanded and displayed in the two image storage units. The image transmission device according to claim 1, which is characterized.
【請求項4】 伸張表示は1つの画像情報を受信終了時
と略同時に開始することを特徴とした請求項3記載の画
像伝送装置。
4. The image transmission device according to claim 3, wherein the decompression display starts one image information at substantially the same time as the reception end.
【請求項5】 前記送信側で、送信する画像情報と取込
圧縮する画像情報を送信側の前記2つの画像記憶部に順
次切り換えて記憶するとともに、前記受信側で、受信し
た画像情報と伸張表示する画像情報を受信側の前記2つ
の画像記憶部に順次切り換えて記憶することを特徴とし
た請求項1、請求項2、請求項3又は請求項4記載の画
像伝送装置。
5. The transmission side sequentially stores the image information to be transmitted and the image information to be captured and compressed in the two image storage units on the transmission side, and stores the image information with the received image information at the reception side. The image transmission device according to claim 1, 2, 3, or 4, wherein image information to be displayed is sequentially switched and stored in the two image storage units on the receiving side.
JP27327595A 1995-10-20 1995-10-20 Image transmitter Pending JPH09116902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27327595A JPH09116902A (en) 1995-10-20 1995-10-20 Image transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27327595A JPH09116902A (en) 1995-10-20 1995-10-20 Image transmitter

Publications (1)

Publication Number Publication Date
JPH09116902A true JPH09116902A (en) 1997-05-02

Family

ID=17525579

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27327595A Pending JPH09116902A (en) 1995-10-20 1995-10-20 Image transmitter

Country Status (1)

Country Link
JP (1) JPH09116902A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7082165B2 (en) 2000-07-26 2006-07-25 Matsushita Electric Industrial Co., Ltd. Video compression and transmission apparatus and video compression and transmission method
US8970572B2 (en) 2011-09-29 2015-03-03 Samsung Display Co., Ltd. Display device and driving method thereof
US9257100B2 (en) 2011-09-26 2016-02-09 Samsung Display Co., Ltd. Display device and driving method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7082165B2 (en) 2000-07-26 2006-07-25 Matsushita Electric Industrial Co., Ltd. Video compression and transmission apparatus and video compression and transmission method
US9257100B2 (en) 2011-09-26 2016-02-09 Samsung Display Co., Ltd. Display device and driving method thereof
US8970572B2 (en) 2011-09-29 2015-03-03 Samsung Display Co., Ltd. Display device and driving method thereof

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