JPH02119464A - Encoding system for picture between two points - Google Patents
Encoding system for picture between two pointsInfo
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- JPH02119464A JPH02119464A JP63272604A JP27260488A JPH02119464A JP H02119464 A JPH02119464 A JP H02119464A JP 63272604 A JP63272604 A JP 63272604A JP 27260488 A JP27260488 A JP 27260488A JP H02119464 A JPH02119464 A JP H02119464A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000007613 environmental effect Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 7
- 238000003672 processing method Methods 0.000 abstract description 4
- 238000013139 quantization Methods 0.000 description 16
- 230000006866 deterioration Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 238000000926 separation method Methods 0.000 description 6
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は２地点間の画像符号化装置において、画像信号
を能率良く符号化するための２地点間画像符号化方式に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a point-to-point image encoding method for efficiently encoding image signals in a point-to-point image encoding device.
画像信号を能率良く符号化するための従来の技術は、入
力画像信号の性質と人間の視覚特性を利用して、画像の
劣化が人間の目に見えにくいように入力画像信号の冗長
度を除去し符号ビット数を減らすものである。しかしな
がら、従来の技術では、再生画像を表示している受信側
での環境条件が符号化処理に利用されていないため、十
分効率的な符号化処理ができないという欠点があった。Conventional techniques for efficiently encoding image signals utilize the properties of the input image signal and human visual characteristics to remove redundancy in the input image signal so that image degradation is less noticeable to the human eye. This reduces the number of code bits. However, in the conventional technology, the environmental conditions on the receiving side displaying the reproduced image are not utilized in the encoding process, and therefore, there is a drawback that the encoding process cannot be performed sufficiently efficiently.
本発明は、先に示した従来技術の問題点、にかんがみて
創作されたものであり、２地点間の画像符号化装置にお
いて、再生画像を表示している受信側での環境条件をも
利用して画像信号の符号化を行なうことにより、画像品
質が良く符号化効率の優れた２地点間画像符号化方式を
提供することを目的とする。The present invention was created in view of the problems of the prior art described above, and utilizes the environmental conditions on the receiving side displaying the reproduced image in an image encoding device between two points. It is an object of the present invention to provide a point-to-point image encoding method that has good image quality and excellent encoding efficiency by encoding an image signal.
本発明は上記目的を達成するために、２地点間の画像符
号化装置において、入力画像信号の冗長度を削減し、そ
れを量子化・符号化して符号を得る符号化処理回路と、
前記符号化処理回路によって得られる符号を復号化して
再生画像信号を得る復号化処理回路と、前記再生画像信
号をモニタする場所の環境をあらわす情報を得る環境検
出回路と、前記符号化処理回路によって得られる符号を
前記復号化処理回路に送るための伝送路と、前記環境検
出回路によって得られる環境情報を前記符号化処理回路
に送るための伝送路と、を具え、前記符号化処理回路は
、前記環境検出回路から得られる環境情報にもとづいて
符号化処理の制御をし、再生画像を表示している受信側
での環境条件をも利用して画像信号の符号化を行なうも
のである。In order to achieve the above object, the present invention includes an encoding processing circuit that reduces the redundancy of an input image signal, quantizes and encodes it, and obtains a code in an image encoding device between two points.
a decoding processing circuit that decodes the code obtained by the encoding processing circuit to obtain a reproduced image signal; an environment detection circuit that obtains information representing the environment of a place where the reproduced image signal is monitored; and the encoding processing circuit. The encoding processing circuit includes a transmission path for sending the obtained code to the decoding processing circuit, and a transmission path for sending the environmental information obtained by the environment detection circuit to the encoding processing circuit. The encoding process is controlled based on the environment information obtained from the environment detection circuit, and the image signal is encoded using also the environmental conditions on the receiving side displaying the reproduced image.
〔実施例〕
第１図は本発明の原理を示す構成図であり、地点１から
地点２へ画像符号化を行なう場合を示している。点線で
囲まれた部分が本発明にかかわるところである。[Embodiment] FIG. 1 is a block diagram showing the principle of the present invention, and shows a case where image encoding is performed from point 1 to point 2. The portion surrounded by dotted lines is related to the present invention.
地点１において、入力端子１より入力された画像信号は
符号化処理回路２によって冗長度を削減され符号化され
る。その際符号化処理回路２は、出力端子７より出力さ
れる再生画像信号を映像として観察している場所におけ
る環境情報を、入力端子８を有する環境検出回路４より
伝送路６を通して受け、あらかじめ定められた規則にし
たがって該環境情報により符号化処理方法や処理のため
のパラメータを適応的に変化させる。符号化処理回路２
によって得られる符号は伝送路５を通って復号化処理回
路３へ送られる。復号化処理回路３は符号化処理回路２
に送られた環境情報と同じ情報を環境検出回路４より受
け、その情報により符号化処理回路２と全く同様に復号
化処理方法や処理のためのパラメータを適応的に変化さ
せて、該符号を復号化し再生画像信号を出力端子７へ供
給する。At a point 1, an image signal inputted from an input terminal 1 is encoded by an encoding processing circuit 2 with its redundancy reduced. At this time, the encoding processing circuit 2 receives environmental information at a place where the reproduced image signal outputted from the output terminal 7 is observed as a video from the environment detection circuit 4 having an input terminal 8 through the transmission line 6, and receives the environmental information determined in advance. The encoding processing method and processing parameters are adaptively changed based on the environmental information according to the established rules. Encoding processing circuit 2
The code obtained is sent to the decoding processing circuit 3 through the transmission line 5. The decoding processing circuit 3 is the encoding processing circuit 2
The environment detection circuit 4 receives the same information as the environment information sent to the encoder, and uses that information to adaptively change the decoding processing method and processing parameters in exactly the same way as the encoding processing circuit 2. The decoded and reproduced image signal is supplied to the output terminal 7.
なお伝送路６は、図示しない外部装置により地点２から
地点１へ信号を送るための伝送路と共通で使うものであ
る。The transmission path 6 is also used as a transmission path for transmitting a signal from point 2 to point 1 by an external device (not shown).
第２図は本発明の第１の具体的実施例を示す符号化の構
成図であり、本実施例では符号化対象とする画像信号を
白黒画像信号とし、画像信号の画素値が大きいほど明る
いものとする。即ち、地点１から地点２へ画像符号化を
行なう場合を示している。本実施例では第１図における
符号化処理回路２として、第２図におけるブロック分割
回路１０．２次元離散コサイン変換回路１１、量子化器
１２、符号化・多重化回路１３、平均値計算回路１４、
ステップ幅決定回路１５を用い、第１図における復号化
処理回路３として、第２図における分離・復号化回路１
６、逆量子化器１７．２次元逆離散コサイン変換回路１
８、画像構成回路１９、ステップ幅決定回路１５゛を用
いる。また、本実施例では第１図における環境検出回路
４として、第２図における設定明度検出回路２ｏを用い
る。ここで設定明度検出回路２ｏとは、再生画像を表示
するモニタ上で、明度調整つまみにより設定されている
画面の設定明度をＭＯＤＥＩ〜ＭＯＤＥ４の４段階であ
られす回路である。FIG. 2 is an encoding configuration diagram showing the first specific embodiment of the present invention. In this embodiment, the image signal to be encoded is a monochrome image signal, and the larger the pixel value of the image signal, the brighter it is. shall be taken as a thing. That is, a case is shown in which image encoding is performed from point 1 to point 2. In this embodiment, as the encoding processing circuit 2 in FIG. 1, the block division circuit 10 in FIG. ,
Using the step width determination circuit 15, the separation/decoding circuit 1 in FIG. 2 is used as the decoding processing circuit 3 in FIG.
6. Inverse quantizer 17. Two-dimensional inverse discrete cosine transform circuit 1
8. An image composition circuit 19 and a step width determination circuit 15' are used. Further, in this embodiment, the setting brightness detection circuit 2o in FIG. 2 is used as the environment detection circuit 4 in FIG. 1. Here, the set brightness detection circuit 2o is a circuit that adjusts the set brightness of the screen set by the brightness adjustment knob in four stages MODEI to MODE4 on the monitor displaying the reproduced image.
第２図において、地点１では図示しない外部装置から画
像信号が入力端子９に入力され、当該画像信号はブロッ
ク分割回路１ｏで走査変換によりｍ画素×ｎラインのブ
ロックに分割される。ブロック内のｍＸｎ個の画素値は
、２次元離散コサイン変換回路１１で離散コサイン変換
され、ｍ×ｎ個の変換係数が量子化器１２に供給される
。量子化器１２では当該変換係数がステップ幅決定回路
１５で決定されたステップ幅で量子化され、量子化レベ
ル番号２５が符号化・多重化回路１３に供給される。ま
た、平均値計算回路１４においてはブロック内のｍ ｘ
ｎ個の画素値のブロック内平均値データ２６が算出さ
れ、当該ブロック内平均値データ２６はステップ幅決定
回路１５および符号化・多重化回路１３に供給される。In FIG. 2, at a point 1, an image signal is input to an input terminal 9 from an external device (not shown), and the image signal is divided into blocks of m pixels×n lines by scan conversion in a block division circuit 1o. The m×n pixel values in the block are subjected to discrete cosine transform in a two-dimensional discrete cosine transform circuit 11, and m×n transform coefficients are supplied to a quantizer 12. The quantizer 12 quantizes the transform coefficient with the step width determined by the step width determining circuit 15, and supplies the quantization level number 25 to the encoding/multiplexing circuit 13. In addition, in the average value calculation circuit 14, m x in the block
Intra-block average value data 26 of n pixel values is calculated, and the in-block average value data 26 is supplied to the step width determination circuit 15 and the encoding/multiplexing circuit 13.
符号化・多重化回路１３では、量子化レベル番号２５と
ブロック内平均値データ２６とが符号化・多重化され、
得られた符号が伝送路２３を通って地点２における分離
・復号化回路１６に供給され、分離・復号化されて再び
量子化レベル番号２５とブロック内平均値データ２６が
得られる。量子化レベル番号２５は逆量子化器１７に供
給され、ステップ幅決定回路１５′で決定されたステッ
プ幅で逆量子化され、ｍｘｎ個の量子化された変換係数
が得られる。量子化された変換係数は２次元逆離散コサ
イン変換回路１８に供給され、２次元逆離散コサイン変
換によってｍＸｎ個の画素値が得られ、当該画素値は画
像構成回路１９で走査変換されて再生画像信号として出
力端子２１より出力される。また、分離・復号化回路１
６によって分離・復号化されたブロック内平均値データ
２６はステップ幅決定回路１５゛に供給される。The encoding/multiplexing circuit 13 encodes/multiplexes the quantization level number 25 and the intra-block average value data 26,
The obtained code is supplied to the separation/decoding circuit 16 at point 2 through the transmission path 23, where it is separated and decoded to obtain the quantization level number 25 and intra-block average value data 26 again. The quantization level number 25 is supplied to the inverse quantizer 17, and is inversely quantized with the step width determined by the step width determining circuit 15' to obtain m×n quantized transform coefficients. The quantized transform coefficients are supplied to the two-dimensional inverse discrete cosine transform circuit 18, and mXn pixel values are obtained by the two-dimensional inverse discrete cosine transform, and the pixel values are scan-converted in the image composition circuit 19 to create a reproduced image. It is output from the output terminal 21 as a signal. In addition, the separation/decoding circuit 1
The intra-block average value data 26 separated and decoded by step width determining circuit 15' is supplied to step width determining circuit 15'.
一方、地点２において出力端子２１より出力される再生
画像信号を映像として表示するモニタ上で明度調整つま
みにより設定されている設定明度が、入力端子２２より
入力され設定明度検出回路２０に供給される。設定明度
検出回路２０では供給された設定明度がＭＯＤＥＬ〜Ｍ
ＯＤＥ４の４段階であられされモード情報２７として出
力される。ここで各ＭＯＤＥについては、ＭＯＤＥｌは
明度が最も暗く設定されている場合とし、ＭＯＤＥ２か
らＭＯＤＥ３になる程明度が明るく設定されており、Ｍ
ＯＤＥ４は明度が最も明るく設定されている場合とする
。モード情報２７は地点２のステップ幅決定回路１５゛
に供給されるとともに、伝送路２４を通って地点１のス
テ・ツブ幅決定回路１５に供給される。地点１のステッ
プ幅決定回路１５および地点２のステップ幅決定回路１
５′ではブロック内平均値データ２６とモード情報２７
より第３図の規則にしたがって同一の量子化ステップ幅
が決定され、それぞれ量子化器１２、逆量子化器１７に
供給される。以下に第３図の規則について説明する。On the other hand, the set brightness set by the brightness adjustment knob on the monitor that displays the reproduced image signal outputted from the output terminal 21 as a video at point 2 is inputted from the input terminal 22 and supplied to the set brightness detection circuit 20. . In the setting brightness detection circuit 20, the supplied setting brightness is MODEL~M.
It is output as mode information 27 in four stages of ODE4. Here, for each MODE, MODE1 is set to the darkest brightness, the brightness is set brighter from MODE2 to MODE3, and M
It is assumed that ODE4 is set to the brightest brightness. The mode information 27 is supplied to the step width determining circuit 15' at point 2, and is also supplied to the step width determining circuit 15 at point 1 through the transmission line 24. Step width determination circuit 15 at point 1 and step width determination circuit 1 at point 2
5', intra-block average value data 26 and mode information 27
The same quantization step width is determined according to the rules shown in FIG. 3, and is supplied to the quantizer 12 and inverse quantizer 17, respectively. The rules shown in FIG. 3 will be explained below.
モニタの設定明度が暗くなっているＭＯＤＥＬの場合、
ブロック内平均値が小さい時にはモニタには非常に暗い
映像が映り、人間には再生画像の劣化が判別しにくいた
め、量子化ステップ幅を大きくし劣化を多めに許容する
。ブロック内平均値が大きい時にはモニタには明るい映
像が映り、人間には再生画像の劣化が判別しやすいため
、量子化ステップ幅を小さくし劣化を少なくする。しか
しブロック内平均値が非常に大きい時にはモニタには非
常に明るい映像が映り再生画像の劣化が判別しにくくな
るため、量子化ステップ幅を大きくし劣化を多めに許容
する。In the case of MODEL where the brightness setting of the monitor is dark,
When the intra-block average value is small, a very dark image is displayed on the monitor and it is difficult for humans to discern the deterioration of the reproduced image, so the quantization step width is increased to allow more deterioration. When the intra-block average value is large, a bright image appears on the monitor and it is easy for humans to discern deterioration in the reproduced image, so the quantization step width is made small to reduce the deterioration. However, when the intra-block average value is very large, a very bright image is displayed on the monitor and it becomes difficult to discern the deterioration of the reproduced image, so the quantization step width is increased to allow more deterioration.
一方モニタの設定明度が明るくなっているＭＯＤＥ４の
場合には、全体的にブロック内平均値が小さい程再生画
像の劣化が判別しやすいため、量子化ステップ幅を小さ
くする。しかし、ブロック内平均値が非常に小さい部分
ではモニタには非常に暗い映像が映り再生画像の劣化が
判別しにくいため、量子化ステップ幅を大きくする。On the other hand, in the case of MODE 4 where the brightness setting of the monitor is brighter, the quantization step width is made smaller because the smaller the average value within a block as a whole, the easier it is to determine the deterioration of the reproduced image. However, in a portion where the intra-block average value is very small, a very dark image appears on the monitor and it is difficult to discern the deterioration of the reproduced image, so the quantization step width is increased.
このように本実施例によれば、再生画像を観察している
モニタの設定明度と符号化される画像信号のブロック内
平均値を利用して変換係数の量子化ステップ幅を決定し
ているため、再生画像の画質劣化を目立ちにくいように
しつつ符号化ビット数を低減することができる。なお、
モニタの設定明度は変化することが非常に少ないと思わ
れるため、モード情報２７は例えば１秒間に１度伝送す
れば十分であり、そのための情報量は非常に少なくて済
む。In this way, according to this embodiment, the quantization step width of the transform coefficient is determined using the set brightness of the monitor on which the reproduced image is viewed and the intra-block average value of the image signal to be encoded. , it is possible to reduce the number of encoding bits while making deterioration in the quality of the reproduced image less noticeable. In addition,
Since the set brightness of the monitor is considered to change very rarely, it is sufficient to transmit the mode information 27, for example, once every second, and the amount of information for this purpose is very small.
第４図は本発明の第２の具体的実施例を示す符号化の構
成図であり、地点１から地点２へ画像符号化を行なう場
合を示している。本実施例では第１図における符号化処
理回路２として、第４図におけるブロック分割回路３１
．２次元離散コサイン変換回路３２、量子化器３３、符
号化・多重化回路３４、ステップ幅決定回路３５を用い
、第１図における復号化処理回路３として、第４図にお
ける分離・復号化回路３６、逆量子化器３７．２次元逆
離散コサイン変換回路３８、画像構成回路３９、ステッ
プ幅決定回路３５′を用いる。また、実施例では第１図
における環境検出回路４として、′！ｊＳ４図における
視点検出回路４０を用いる。また、第１図における入力
端子１、伝送路５．６、出力端子７、入力端子８として
、第４図におけるそれぞれ対応した入力端子３０、伝送
路４３．４４、出力端子４１、入力端子４２を用いる。FIG. 4 is a block diagram of encoding showing a second specific embodiment of the present invention, and shows a case where image encoding is performed from point 1 to point 2. In this embodiment, the block dividing circuit 31 in FIG. 4 is used as the encoding processing circuit 2 in FIG.
．． Using a two-dimensional discrete cosine transform circuit 32, a quantizer 33, an encoding/multiplexing circuit 34, and a step width determining circuit 35, the decoding processing circuit 3 in FIG. 1 is used as the separation/decoding circuit 36 in FIG. , an inverse quantizer 37, a two-dimensional inverse discrete cosine transform circuit 38, an image composition circuit 39, and a step width determination circuit 35' are used. In addition, in the embodiment, as the environment detection circuit 4 in FIG. 1, '! The viewpoint detection circuit 40 in Figure jS4 is used. In addition, as the input terminal 1, transmission line 5.6, output terminal 7, and input terminal 8 in FIG. 1, the corresponding input terminal 30, transmission line 43, 44, output terminal 41, and input terminal 42 in FIG. use
ここで視点検出回路４０とは、地点２において観察者の
視点がモニタのどの部分にあるかを検出する回路である
。Here, the viewpoint detection circuit 40 is a circuit that detects which part of the monitor the observer's viewpoint is located at point 2.
第５図はモニタ上の画面をｍ画素×ｎラインのブロック
に分割したものである。例えば観察者の視点がモニタ上
のブロック２の位置にあった場合、その情報が視点検出
回路４０からステップ幅決定回路３５および３５゛に供
給される。ステップ幅決定回路３５及び３５′では量子
化ステップ幅をブロック２で８１、プロ・ツクＡ−Ｈで
８２、ブロックＩ−Ｘで８３、それ以外のブロックで８
４と決定する。ただし、
Ｓ、＜８２ ＜Ｓ３ ＜Ｓ４
である。すなわち、観察者が着目している部分（ブロッ
ク２）では量子化ステップ幅が小さく高品質な映像が得
られる。また、そこから離れるにしたがって観察者には
画質劣化が検知しずらくなるため、量子化ステップ幅を
大きくして劣化を多く許容することにより、効率的な符
号化が実現できる。FIG. 5 shows a screen on a monitor divided into blocks of m pixels x n lines. For example, when the observer's viewpoint is at the position of block 2 on the monitor, that information is supplied from the viewpoint detection circuit 40 to the step width determination circuits 35 and 35'. The step width determination circuits 35 and 35' set the quantization step width to 81 for block 2, 82 for blocks A-H, 83 for blocks I-X, and 8 for other blocks.
Decided to be 4. However, S, <82 <S3 <S4. That is, in the part (block 2) that the observer is paying attention to, the quantization step width is small and a high-quality image is obtained. Further, as the distance from the image increases, it becomes difficult for the observer to detect image quality deterioration, so efficient encoding can be realized by increasing the quantization step width and allowing more deterioration.
上述したように、本発明によれば、２地点間の画像符号
化装置において、再生画像を表示している受信側での環
境条件をも利用して画像信号の符号化を行なっているた
め、再生画像の品質を良好にしつつ符号化ビット数を低
減する」二で大きな効果がある。As described above, according to the present invention, in the image encoding device between two points, the image signal is encoded by also utilizing the environmental conditions on the receiving side displaying the reproduced image. This method has great effects in reducing the number of encoded bits while improving the quality of reproduced images.
第１図は本発明の詳細な説明するための符号化の構成図
、
第２図は本発明の第１の具体的実施例を説明するための
符号化の構成図、
第３図は本発明の第１の具体的実施例を説明するため、
ブロック内平均値と４つのモードと量子化ステップ幅と
の関係を示した図、
第４図は本発明の第２の具体的実施例を説明するための
符号化の構成図、
第５図は本発明の第２の具体的実施例を説明するため、
画面上のブロックの配置を示した図である。
１・・・入力端子、２・・・符号化処理回路、３・・・
復号化処理回路、４・・・環境検出回路、５・・・伝送
路、６・・・伝送路、７・・・出力端子、８・・・入力
端子、９・・・入力端子、１０・・・ブロック分割回路
、１１・・・２次元離散コサイン変換回路、１２・・・
量子化器、１３・・・符号化・多重化回路、１４・・・
平均値計算回路、１５・・・ステップ幅決定回路、１６
・・・分離・複合化回路、１７・・・逆量子化器、１８
・・２次元逆離散コサイン変換回路、１９・・・画像構
成回路、２０・・・設定明度検出回路、２１・・・出力
端子、２２・・・入力端子、２３・・・伝送路、２４・
・・伝送路、２５・・・量子化レベル番号、２６・・・
ブロック内平均値データ、２７・・・モード情報、３ｏ
・・・入力端子、３１・・・ブロック分割回路、３２・
・・２次元離散コサイン変換回路、３３・・・量子化器
、３４・・・符号化・多重化回路、３５・・・ステップ
幅決定回路、３６・・・分離・複合化回路、３７・・・
逆量子化器、３８・・・２次元逆離散コサイン変換回路
、３９・・・画像構成回路、４０・・・視点検出回路、
４１・・・出力端子、４２・・・入力端子、４３・・・
伝送路、４４・・・伝送路。
出願人代理人 弁理士 鈴江武彦
第
図FIG. 1 is a block diagram of encoding for explaining the present invention in detail. FIG. 2 is a block diagram of coding for explaining the first specific embodiment of the present invention. FIG. 3 is a block diagram of coding for explaining the present invention in detail. In order to explain the first specific example of
A diagram showing the relationship between the intra-block average value, the four modes, and the quantization step width, FIG. 4 is a coding configuration diagram for explaining the second specific embodiment of the present invention, and FIG. To explain the second specific embodiment of the present invention,
FIG. 3 is a diagram showing the arrangement of blocks on a screen. 1... Input terminal, 2... Encoding processing circuit, 3...
Decoding processing circuit, 4...Environment detection circuit, 5...Transmission line, 6...Transmission line, 7...Output terminal, 8...Input terminal, 9...Input terminal, 10. ...Block division circuit, 11...Two-dimensional discrete cosine transform circuit, 12...
Quantizer, 13... Encoding/multiplexing circuit, 14...
Average value calculation circuit, 15...Step width determination circuit, 16
... Separation/complexing circuit, 17... Inverse quantizer, 18
...Two-dimensional inverse discrete cosine transform circuit, 19... Image configuration circuit, 20... Setting brightness detection circuit, 21... Output terminal, 22... Input terminal, 23... Transmission line, 24...
...Transmission line, 25...Quantization level number, 26...
Intra-block average value data, 27...mode information, 3o
...Input terminal, 31...Block division circuit, 32.
...Two-dimensional discrete cosine transform circuit, 33... Quantizer, 34... Encoding/multiplexing circuit, 35... Step width determining circuit, 36... Separation/complexing circuit, 37...・
Inverse quantizer, 38... Two-dimensional inverse discrete cosine transform circuit, 39... Image configuration circuit, 40... Viewpoint detection circuit,
41...Output terminal, 42...Input terminal, 43...
Transmission line, 44... transmission line. Applicant's agent Patent attorney Takehiko Suzue
Claims (1)
して符号を得る符号化処理回路と、前記符号化処理回路
によって得られる符号を復号化して再生画像信号を得る
復号化処理回路と、前記再生画像信号をモニタする場所
の環境をあらわす情報を得る環境検出回路と、 前記符号化処理回路によって得られる符号を前記復号化
処理回路に送るための伝送路と、前記環境検出回路によ
って得られる環境情報を前記符号化処理回路に送るため
の伝送路と、を具え、 前記符号化処理回路は、前記環境検出回路から得られる
環境情報にもとづいて符号化処理の制御をすることを特
徴とする２地点間画像符号化方式。[Claims] An image encoding device between two points, comprising: an encoding processing circuit that reduces the redundancy of an input image signal and obtains a code by quantizing and encoding it; and an encoding processing circuit that obtains a code by the encoding processing circuit. a decoding processing circuit that obtains a reproduced image signal by decoding the code obtained by the encoding processing circuit; an environment detection circuit that obtains information representing the environment of a place where the reproduced image signal is monitored; a transmission line for sending environmental information obtained by the environment detection circuit to the encoding processing circuit; the encoding processing circuit includes environmental information obtained from the environment detection circuit; A point-to-point image encoding method characterized by controlling encoding processing based on environmental information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27260488A JP2647929B2 (en) | 1988-10-28 | 1988-10-28 | Point-to-point image coding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27260488A JP2647929B2 (en) | 1988-10-28 | 1988-10-28 | Point-to-point image coding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02119464A true JPH02119464A (en) | 1990-05-07 |
| JP2647929B2 JP2647929B2 (en) | 1997-08-27 |
Family
ID=17516243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27260488A Expired - Lifetime JP2647929B2 (en) | 1988-10-28 | 1988-10-28 | Point-to-point image coding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2647929B2 (en) |
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