초록 ▼

A cable television system (400) includes a transmitter (200) for generating a digital optical signal (204) and a receiver (300) for receiving said digital optical signal and converting it to an analog signal. The transmitter (200) includes a processor (238) for processing inputs and generating a gai

A cable television system (400) includes a transmitter (200) for generating a digital optical signal (204) and a receiver (300) for receiving said digital optical signal and converting it to an analog signal. The transmitter (200) includes a processor (238) for processing inputs and generating a gain/loss parameter which is applied via a gain/loss amplifier (250) to an incoming analog signal (232). The modified digital signal received by the digital optical receiver (300) decodes the applied gain/loss parameter at a converter (325) and applies the information to the output analog signal via a gain/loss amplifier (330).

대표청구항 ▼

A cable television system (400) includes a transmitter (200) for generating a digital optical signal (204) and a receiver (300) for receiving said digital optical signal and converting it to an analog signal. The transmitter (200) includes a processor (238) for processing inputs and generating a gai

A cable television system (400) includes a transmitter (200) for generating a digital optical signal (204) and a receiver (300) for receiving said digital optical signal and converting it to an analog signal. The transmitter (200) includes a processor (238) for processing inputs and generating a gain/loss parameter which is applied via a gain/loss amplifier (250) to an incoming analog signal (232). The modified digital signal received by the digital optical receiver (300) decodes the applied gain/loss parameter at a converter (325) and applies the information to the output analog signal via a gain/loss amplifier (330). a transmission rate of the different mode of transmission is lower than a transmission rate for the moving image data of the plurality of pictures. 6. An image communication method according to claim 5, wherein the frame ID is a frame number. 7. An image communication method according to claim 5, wherein the frame ID comprises time code data. 8. An image communication method comprising the steps of: sequentially transmitting moving image data of a plurality of pictures to a receiver side, each picture being identified by a frame ID; and transmitting high-resolution information of a picture requested by the receiver side, among the plurality of pictures, in a mode of transmission different from a mode of transmission for the moving image data, wherein the receiver side requests the picture among the plurality of pictures by specifying the frame ID identifying the picture, wherein the moving image data of the plurality of pictures is transmitted in an isochronous transmission complying with an IEEE 1394 Standard while the high-resolution information is transmitted in an asynchronous transmission complying with the IEEE 1394 Standard. 9. An image communication method comprising the steps of: sequentially transmitting moving image data of a plurality of pictures to a receiver side, each picture being identified by a frame ID; and transmitting high-resolution information of a picture requested by the receiver side, among the plurality of pictures, in a mode of transmission different from a mode of transmission for the moving image data, wherein the receiver side requests the picture among the plurality of pictures by specifying the frame ID identifying the picture, wherein the moving image data of the plurality of pictures is transmitted in an isochronous transmission, and wherein the high-resolution information is transmitted through an isochronous transmission channel different from a channel used for the moving image data. 10. An image communication method comprising the steps of: sequentially transmitting moving image data of a plurality of pictures to a receiver side, each picture being identified by a frame ID; and transmitting high-resolution information of a picture requested by the receiver side, among the plurality of pictures, in a mode of transmission different from a mode of transmission for the moving image data, wherein the receiver side requests the picture among the plurality of pictures by specifying the frame ID identifying the picture, wherein the high-resolution information is a high-frequency component in an orthogonal transform coding of the moving image data. 11. An image communication method according to claim 10, wherein the moving image data of the plurality of pictures includes a direct-current component in the orthogonal transform coding of the moving image data. 12. An image communication method comprising the steps of: sequentially transmitting moving image data of a plurality of pictures to a receiver side; and transmitting high-resolution information of a picture requested by the receiver side, among the plurality of pictures, in a mode of transmission different from a mode of transmission for the moving image data, wherein the high-resolution information is produced from a differential between a partially decoded image of the moving image data of the plurality of pictures and an original image. 13. An image communication method comprising the steps of: sequentially transmitting moving image data of a plurality of pictures to a receiver side, each picture being identified by a frame ID; and transmitting high-resolution information of a picture requested by the receiver side, among the plurality of pictures, in a mode of transmission different from a mode of transmission for the moving image data, wherein the receiver side requests the picture among the plurality of pictures by specifying the frame ID identifying the picture, wherein the moving image data of the plu