US 6,553,073 B1 · Sending device, receiving device, sending-receiving device, transmitter, and transmitting method

Abstract

An object of the present invention is to provide a sending device, a receiving device, and a sending/receiving device which make it possible to easily implement a two-channel compressed moving picture transmission system by using an existing single-channel compressed moving picture transmission system. The sending device includes transmission systems corresponding to two channels including video bit rate reduction encoders 2 and 6 for compressing picture data, and SDDI encoders 4 and 8 for generating predetermined serial signal data from compressed picture data, and a data selector 9 for conducting changeover between serial signal data of channel 1 output from the transmission system of the channel 1 and serial signal data of channel 2 output from the transmission system of the channel 2 on the basis of a reference frame signal RF.

Claims22

Dependent claims

In a sending device comprising a plurality of sending systems, each of the sending systems including:

compressing means for compressing picture data;
and
serial signal generation means for adding a predetermined synchronizing signal to compressed picture data compressed by said compression means to thereby generate predetermined serial signal data, and
transmitting serial signal data of a plurality of channels from said plurality of sending systems,
the transmitting apparatus being characterized in that
there is provided a changeover means for changing over between the serial signal data of a certain channel output from said serial signal generation means of said sending systems and serial signal data of another channel output from the serial signal generation means of another sending system of said plurality of sending systems, according to a changeover signal based upon said synchronizing signal, and
the serial signal data of said certain channel and the serial signal data of said another channel are serially transmitted according to said changeover signal;
whereby said synchronizing signal is part of a packet that includes video data corresponding to said plurality of channels, said synchronizing signal being included in an ancillary data portion of said packet separate from any video data and audio data.

5 more elements

In a receiving device including a plurality of receiving systems, each of the receiving systems including:

serial signal detection means for detecting, from serial signal data obtained by adding a predetermined synchronizing signal to compressed picture data, said compressed picture data and said predetermined synchronizing signal;
and
expansion means for expanding said compressed picture data detected by said serial signal detection means to thereby restore original picture data, and
receiving serial signal data of a plurality of channels to thereby output said original picture data of the plurality of channels from said plurality of receiving systems,
the receiving apparatus being characterized in that there is provided a changeover means for outputting said compressed picture data output from said serial signal detection means to said receiving system of a certain channel and another receiving system of another channel included in said plurality of receiving systems changed over according to a changeover signal based upon said synchronizing signal, and
changeover between the compressed picture data of said certain channel and the compressed picture data of said another channel is conducted according to said changeover signal to thereby output original picture data of said certain channel and original picture data of said another channel from said receiving system and said another receiving system;
whereby said synchronizing signal is part of a packet that includes video data corresponding to said plurality of channels, said synchronizing signal being included in an ancillary data portion of said packet separate from any video data and audio data.

4 more elements

In a sending/receiving device comprising a sending unit including a plurality of sending systems, each of the sending systems having:

compression means for compressing picture data;
and
serial signal generation means for adding a predetermined synchronizing signal to compressed picture data compressed by said compression means to thereby generate predetermined serial signal data, and
transmitting serial signal data of a plurality of channels from said plurality of sending systems,
a receiving unit including a plurality of receiving systems, each of the receiving systems including
serial signal detection means for detecting said compressed picture data and said synchronizing signal from said serial signal data;
and
expansion means for expanding said compressed picture data detected by said serial signal detection means to thereby restore original picture data,
receiving serial signal data of a plurality of channels to thereby output original picture data of the plurality of channels from said plurality of receiving systems,
the transmitting receiving apparatus being characterized in that in said sending unit, there is provided a changeover means for changing over between the serial signal data of a certain channel output from said serial signal generation means of said sending systems and serial signal data of another channel output from the serial signal generation means of another sending system included in said plurality of sending systems, according to a changeover signal based upon said synchronizing signal, and
the serial signal data of said certain channel and the serial signal data of said another channel are serially transmitted according to said changeover signal, and
in said receiving unit,
there is provide a changeover means for outputting said compressed picture data output from said serial signal detection means to said receiving system of a certain channel and another receiving system of another channel included in said plurality of receiving systems changed over according to a changeover signal based upon said synchronizing signal, and changeover between the compressed picture data of said certain channel and the compressed picture data of said another channel is conducted according to said changeover signal to thereby output original picture data of said certain channel and original picture data of said another channel from said receiving system and said another receiving system;
whereby said synchronizing signal is part of a packet that includes video data corresponding to said plurality of channels, said synchronizing signal being included in an ancillary data portion of said packet separate from any video data and audio data.

11 more elements

In a transmission device for transmitting video data of a plurality of channels, the transmission apparatus, comprising:

compression means for compressing video data of a first channel and video data of a second channel to thereby generate a first compressed video data and a second compressed video data;
conversion means for converting said first compressed video data and said second compressed video data to a predetermined serial transmission format;
and
transmission control means for controlling transmission timing of the first converted compressed video data and the second converted compressed video data such that said first converted compressed video data and said second converted compressed video data converted to the predetermined transmission format by said conversion means are transmitted by using one serial transmission system;
whereby a synchronization signal is provided for switching among data corresponding to said plurality of channels;
and
whereby said synchronizing signal is part of a packet that includes video data corresponding to said plurality of channels, said synchronizing signal being included in an ancillary data portion of said packet separate from any video data and audio data.

4 more elements

In a transmission method for transmitting video data of a plurality of channels,

the transmission method being characterized in that
video data of a first channel and video data of a second channel are compressed to thereby generate a first compressed video data and a second compressed video data;
said first compressed video data and said second compressed video data are converted to a predetermined serial transmission format;
and
transmission timing of said first converted compressed video data and said second converted compressed video data are controlled such that said first converted compressed video data and said second converted compressed video data converted to the predetermined transmission format are transmitted by using one serial transmission system;
whereby a synchronization signal is provided for switching among data corresponding to said plurality of channels;
and
whereby said synchronizing signal is part of a packet that includes video data corresponding to said plurality of channels, said synchronizing signal being included in an ancillary data portion of said packet separate from any video data and audio data.

5 more elements

Dependencies are inferred from the claim text.

Sending device, receiving device, sending-receiving device, transmitter, and transmitting method

Life of this patent

Sending device, receiving device, sending-receiving device, transmitter, and transmitting method

Life of this patent

Abstract

Claims22