Time-shift replaying system
To provide a time-shift replaying system, which includes two time-shift replaying devices and allows two users to watch video image with different time-shift periods at the same time. Especially, one of the time-shift replaying device functions as a server, and the another functions as a client, which is simplified its structure and at low cost by comparison with the time-shift replaying device functioning as a server.
1. A time-shift replaying system comprising:
a first time-shift replaying device, which comprises a tuner receiving video signal, a storage unit temporarily storing a pre-set time period of video signal as digital code, a first read unit reading said video signal from said storage unit after the elapse of a first time-shift period based on a first pointer, a time-shift control unit setting said first pointer according to information of said first time-shift period entered by a user, a first display displaying video image after the elapse of said first time-shift period based on said video signal read by said first read unit, and a first communication unit; and
a second time-shift replaying device having no tuner, which comprises a second communication unit, a second read unit reading said video signal from said storage unit via said first and second communication units after the elapse of a second time-shift period based on a second pointer set by said time-shift control unit based on information of said second time-shift period entered by a user via said first and second communication units, and a second display displaying video image after the elapse of said second time-shift period based on the video signal read by said second read unit.
2. The time-shift replaying system claimed in claim 1 , wherein said first time-shift replaying device further comprises a tuner control unit and said second time-shift replaying device further comprised a channel direction unit; and
wherein said tuner control unit controls said tuner and changes a current channel into the other according to an instruction of said channel direction unit.
3. A time-shift replaying system comprising:
a first time-shift replaying device, which comprises a tuner receiving video signal, a first storage unit temporarily storing a pre-set time period of video signal as digital code, a first read unit reading said video signal from said first storage unit after the elapse of a first time-shift period based on a first pointer, a first time-shift control unit setting said first pointer according to information of said first time-shift period entered by a user, a first display displaying video image after the elapse of said first time-shift period based on said video signal read by said first read unit, and a first communication unit; and
a second time-shift replaying device having no tuner, which comprises a second communication unit, a second storage unit temporarily storing a pre-set time period of said video signal transmitted from said first storage unit via said first and second communication units as digital code, a second read unit reading said video signal from said second storage unit after the elapse of a second time-shift period based on a second pointer, a second time-shift control unit setting said second pointer according to information of said second time-shift period entered by a user, and a second display displaying video image after the elapse of said second time-shift period based on the video signal read by said second read unit.
4. The time-shift replaying system claimed in claim 3 , wherein said first time-shift replaying device further comprises a tuner control unit and said second time-shift replaying device further comprised a channel direction unit; and
wherein said tuner control unit controls said tuner and changes a current channel into the other according to an instruction of said channel direction unit.
5. The time-shift replaying system claimed in claim 3 ,
wherein said second time-shift replaying device further comprises a switch having a first state where said switch connects said second storage unit and said second read unit and second state where said switch connects said second communication unit and said second read unit, and
wherein, said second read unit reads said video signal from said first storage unit via said first and second communication units after the elapse of a third time-shift period based on a third pointer set by said first time-shift control unit based on information of said third time-shift period entered by a user via said first and second communication units, if said switch is said second state.
6. A time-shift replaying system comprising:
a first time-shift replaying device, which comprises a first tuner receiving first video signal, a second tuner receiving second video signal, a storage unit temporarily storing a pre-set time period of said first video signal and a pre-set time period of said second video signal as digital code, a first read unit reading said either video signal from said storage unit after the elapse of a first time-shift period based on a first pointer, a time-shift control unit setting said first pointer according to information of said first time-shift period and select channel entered by a user, a first display displaying video image corresponding to said select channel after the elapse of said first time-shift period based on said video signal read by said first read unit, and a first communication unit; and
a second time-shift replaying device having no tuner, which comprises a second communication unit, a second read unit reading either video signal from said storage unit via said first and second communication units after the elapse of a second time-shift period based on a second pointer set by said time-shift control unit based on information of said second time-shift period and select channel entered by a user via said first and second communication units, and a second display displaying video image after the elapse of said second time-shift period based on the video signal corresponding to said select channel read by said second read unit.
7. A time-shift replaying system comprising:
a first time-shift replaying device, which comprises a first tuner receiving first video signal, a second tuner receiving second video signal, a storage unit temporarily storing a pre-set time period of said first video signal and a pre-set time period of said second video signal as digital code, a first read unit reading said either video signal from said storage unit after the elapse of a first time-shift period based on a first pointer, a time-shift control unit setting said first pointer according to information of said first time-shift period and select channel entered by a user, a first display displaying video image corresponding to said select channel after the elapse of said first time-shift period based on said video signal read by said first read unit, and a first communication unit; and
a second time-shift replaying device having no tuner, which comprises a second communication unit, a second storage unit temporarily storing a pre-set time period of said first and/or second video signal transmitted from said first storage unit via said first and second communication units as digital code, a second read unit reading either video signal from said second storage unit after the elapse of a second time-shift period based on a second pointer, a second time-shift control unit setting said second pointer according to information of said second time-shift period and select channel entered by a user, and a second display displaying video image corresponding to said select channel after the elapse of said second time-shift period based on the video signal read by said second read unit.
8. The time-shift replaying system claimed in claim 7 ,
wherein said second time-shift replaying device further comprises a switch having a first state where said switch connects said second storage unit and said second read unit and second state where said switch connects said second communication unit and said second read unit, and
wherein, said second read unit reads either video signal from said first storage unit via said first and second communication units after the elapse of a third time-shift period based on a third pointer set by said first time-shift control unit based on information of said third time-shift period and a select channel entered by a user via said first and second communication units, if said switch is said second state.