Moving picture communication system
The moving picture communication system comprises communication terminals configured to mutually send and receive a color moving picture including luminance information and color information through a network to which the communication terminals are connected. Each of the communication terminals comprises: a transfer bandwidth information acquisition device which acquires transfer bandwidth information representing a bandwidth of a communication path through which the color moving picture is sent and received; a color information compression device which compresses the color information of the color moving picture in accordance with the transfer bandwidth information acquired by the transfer bandwidth information acquisition device; an encoding device which encodes the color moving picture outputted from the color information compression device; a transmission device which transmits the color moving picture encoded by the encoding device; a reception device which receives the encoded color moving picture transmitted from another of the communication terminals; a decoding device which decodes the encoded color moving picture received by the reception device; and a color moving picture output device which outputs the color moving picture decoded by the decoding device.
1 . A moving picture communication system, comprising communication terminals configured to mutually send and receive a color moving picture including luminance information and color information through a network to which the communication terminals are connected, wherein each of the communication terminals comprises:
a transfer bandwidth information acquisition device which acquires transfer bandwidth information representing a bandwidth of a communication path through which the color moving picture is sent and received;
a color information compression device which compresses the color information of the color moving picture in accordance with the transfer bandwidth information acquired by the transfer bandwidth information acquisition device;
an encoding device which encodes the color moving picture outputted from the color information compression device;
a transmission device which transmits the color moving picture encoded by the encoding device;
a reception device which receives the encoded color moving picture transmitted from another of the communication terminals;
a decoding device which decodes the encoded color moving picture received by the reception device; and
a color moving picture output device which outputs the color moving picture decoded by the decoding device.
2 . The moving picture communication system as described in claim 1 , wherein:
the color information is saturation information; and
the color information compression device reduces an amount of the saturation information as the bandwidth narrows, in accordance with the acquired transfer bandwidth information.
3 . The moving picture communication system as defined in claim 1 , wherein the transfer bandwidth information acquisition device acquires the transfer bandwidth information in accordance with delay information of the color moving picture received from the other communication terminal performing two-way communication of the color moving picture.
4 . The moving picture communication system as defined in claim 1 , wherein:
if the color information is compressed by the color information compression device, the encoding device adds compression information relating to this compression to the encoded color moving picture; and
if the reception device receives the compression information in addition to the color moving picture, the decoding device decodes the received color moving picture in accordance with this compression information.