公开(公告)号：US3021488A

公开(公告)日：1962-02-13

申请号：US57040544

申请日：1944-12-29

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON ROBERT C

IPC: H03D3/04 ,  H03K3/04 ,  H03K9/06

CPC classification number: H03D3/04 ,  H03K3/04 ,  H03K9/06

公开(公告)号：US3601530A

公开(公告)日：1971-08-24

申请号：US3601530D

申请日：1969-04-29

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON ROBERT C ,  MITCHELL DOREN ,  REID GEORGE P

IPC: H04N7/15 ,  H04N5/24

CPC classification number: H04N7/15

Abstract: This disclosure relates to a video conference system for a plurality of groups of remotely located conferees. At each group location, a plurality of video cameras are used and the field of each is restricted to a small number of persons in the group. Voice voting and switching are used to determine the location of the person in the group who is talking and to ''''enable'''' the appropriate camera, in response thereto, so that the talker will be seen at the remote location. As different people in the group speak, the appropriate cameras covering the same are successively enabled so that the outgoing video signal matches the audio signal. Operational features include a graphic mode, for the remote display of written or graphic material, and a conference leader mode, in which the system is biased in favor of the leader so as to give him substantial control over the conference.

公开(公告)号：US2637776A

公开(公告)日：1953-05-05

申请号：US2219548

申请日：1948-04-20

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON ROBERT C

IPC: H01P1/08

CPC classification number: H01P1/08

公开(公告)号：US2654804A

公开(公告)日：1953-10-06

申请号：US9568349

申请日：1949-05-27

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON ROBERT C

IPC: H04B3/54

CPC classification number: H04B3/54 ,  H04B2203/5437

公开(公告)号：US2516763A

公开(公告)日：1950-07-25

申请号：US69235046

申请日：1946-08-22

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON ROBERT C ,  LESTER HOCHGRAF

IPC: H04B3/54

CPC classification number: H04B3/54 ,  H04B2203/5437 ,  H04B2203/5466

公开(公告)号：US2481915A

公开(公告)日：1949-09-13

申请号：US65325446

申请日：1946-03-09

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON ROBERT C ,  EMLING JOHN W

IPC: H01C10/20 ,  H04B3/54

CPC classification number: H01C10/20 ,  H04B3/54 ,  H04B2203/5416 ,  H04B2203/5437

公开(公告)号：US2361523A

公开(公告)日：1944-10-31

申请号：US44827842

申请日：1942-06-24

Applicant: BELL TELEPHONE LABOR INC

Inventor： ALFORD REUEL S ,  EDSON ROBERT C

IPC: H04J1/12

CPC classification number: H04J1/12

公开(公告)号：US2236568A

公开(公告)日：1941-04-01

申请号：US28719639

申请日：1939-07-29

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON ROBERT C

IPC: H04R1/22

CPC classification number: H04R1/225