TRANSMITTER AND TRANSMITTER/RECEIVER

• US 20090028280A1
• Filed: 01/09/2007
• Published: 01/29/2009
• Est. Priority Date: 03/01/2006
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Tabira, Yoshihiro, Yanagisawa, Ryogo, Takahashi, Satoshi
• Application Number:
  US12/280,726
• Publication Number:
  US 20090028280A1
• Time in Patent Office: Days
• US Class Current: 375/371
• CPC Class Codes: G09G 2370/12 Use of DVI or HDMI protocol in interfaces along the display data pipeline
• CPC Class Codes: G09G 5/008 Clock recovery
• CPC Class Codes: H04L 7/0008 Synchronisation information channels, e.g. clock distribution lines
• CPC Class Codes: H04N 21/242 Synchronization processes, e.g. processing of PCR [Program Clock References] arrangements for synchronising broadcast or distribution via plural systems in broadcast distribution systems H04H20/18
• CPC Class Codes: H04N 21/4302 Content synchronisation processes, e.g. decoder synchronisation

Abstract

A clock control circuit 22 in a control circuit 21 provided in a transmitter 25 controls a gate circuit 12 based on an instruction from a microcomputer 32 to stop the output of the clock to a cable 115 for a first predetermined period of time. Then, a read-out circuit in the microcomputer 32 accesses an EDID 31 stored in an information storing circuit of a receiver 43 via the cable 115, and specifies the first predetermined period of time based on the EDID 31. A reconfiguration circuit 42 provided in the receiver 43 counts the clock-holding state, and resets at least one of the receiver 43 and a TV 114 if the clock has been stopped for a second predetermined period of time. This reset operation suppresses the display of noise on the TV 114. Therefore, the occurrence of noise due to mis-latching between the clock and the data can be reduced even after a signal switching that entails a change in the clock frequency.

Claims

1. A transmitter for transmitting a clock and data to a receiver, comprising:

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number); and

control means for stopping the transmission of the clock from the transmitter means for a predetermined amount of time when switching the frequency of the clock from one to another.

2. The transmitter of claim 1, wherein the transmitter means transmits the data based on a DVI standard or an HDMI standard.

3. A transmitter for transmitting a clock and data to a receiver, comprising:

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number); and

control means for stopping the transmission of the clock from the transmitter means for a predetermined amount of time when switching the frequency of the clock from one to another,

wherein the control means is given in advance information on the receiver, and specifies the predetermined amount of time for which the transmission of the clock is stopped based on the receiver information.

4. The transmitter of claim 3, wherein the receiver information at least includes information on a manufacturer of the receiver.

5. The transmitter of claim 3, wherein the transmitter means transmits the data based on a DVI standard or an HDMI standard.

6. A transmitter for transmitting a clock and data to a receiver, comprising:

transmitter means for transmitting a clock and data to a receiver via a transmission line, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number);

control means for stopping the transmission of the clock from the transmitter means for a predetermined amount of time when switching the frequency of the clock from one to another; and

read-out means for reading out information on the receiver from the receiver via the transmission line,

wherein the control means specifies the predetermined amount of time for which the transmission of the clock is stopped based on the receiver information read out by the read-out means.

7. The transmitter of claim 6, wherein the receiver information at least includes information on a manufacturer of the receiver.

8. The transmitter of claim 6, wherein the transmitter means transmits the data based on a DVI standard or an HDMI standard.

9. A transmitter/receiver, comprising:

a transmitter for transmitting a clock and data; and

a receiver for receiving the clock and the data transmitted from the transmitter, wherein;

the transmitter includes;

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number); and

control means for stopping the transmission of the clock from the transmitter means for a first predetermined amount of time when switching the frequency of the clock from one to another; and

the receiver includes;

receiver means connected to the transmitter means via a transmission line; and

reconfiguration means for reconfiguring the receiver means upon detecting that the clock received by the receiver means has stopped for a second predetermined amount of time.

10. The transmitter/receiver of claim 9, wherein the first predetermined amount of time is longer than the second predetermined amount of time.

11. The transmitter/receiver of claim 9, wherein the reconfiguration means provided in the receiver performs the reconfiguration by resetting the receiver means.

12. The transmitter/receiver of claim 9, wherein the transmitter means provided in the transmitter transmits the data based on a DVI standard or an HDMI standard.

13. A transmitter/receiver, comprising:

a transmitter for transmitting a clock and data; and

a receiver for receiving the clock and the data transmitted from the transmitter, wherein;

the transmitter includes;

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number); and

control means for stopping the transmission of the clock from the transmitter means for a first predetermined amount of time when switching the frequency of the clock from one to another;

the receiver includes;

receiver means connected to the transmitter means via a transmission line; and

reconfiguration means for reconfiguring the receiver means upon detecting that the clock received by the receiver means has stopped for a second predetermined amount of time; and

the control means provided in the transmitter is given in advance information on the receiver means provided in the receiver, and specifies the first predetermined amount of time for which the transmission of the clock is stopped based on the receiver means information.

14. The transmitter/receiver of claim 13, wherein the first predetermined amount of time is longer than the second predetermined amount of time.

15. The transmitter/receiver of claim 13, wherein the reconfiguration means provided in the receiver performs the reconfiguration by resetting the receiver means.

16. The transmitter/receiver of claim 13, wherein the transmitter means provided in the transmitter transmits the data based on a DVI standard or an HDMI standard.

17. A transmitter/receiver, comprising:

a transmitter for transmitting a clock and data; and

a receiver for receiving the clock and the data transmitted from the transmitter, wherein;

the transmitter includes;

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number);

control means for stopping the transmission of the clock from the transmitter means for a first predetermined amount of time when switching the frequency of the clock from one to another; and

read-out means for reading out information on the receiver;

the receiver includes;

receiver means connected to the transmitter means via a transmission line;

reconfiguration means for reconfiguring the receiver means upon detecting that the clock received by the receiver means has stopped for a second predetermined amount of time; and

information storing means for storing information on the receiver means or the reconfiguration means;

the read-out means provided in the transmitter reads out the information stored in the information storing means; and

the control means provided in the transmitter specifies the first predetermined amount of time for which the transmission of the clock is stopped based on the information stored in the information storing means and read out by the read-out means.

18. The transmitter/receiver of claim 17, wherein the information stored in the information storing means provided in the receiver at least includes information on a manufacturer of the receiver means or the reconfiguration means.

19. The transmitter/receiver of claim 17, wherein the first predetermined amount of time is longer than the second predetermined amount of time.

20. The transmitter/receiver of claim 17, wherein the reconfiguration means provided in the receiver performs the reconfiguration by resetting the receiver means.

21. The transmitter/receiver of claim 17, wherein the transmitter means provided in the transmitter transmits the data based on a DVI standard or an HDMI standard.

22. A transmitter for transmitting a clock and data to a receiver, comprising:

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number); and

control means for stopping the transmission of the data from the transmitter means for a predetermined amount of time when switching the frequency of the clock from one to another.

23. The transmitter of cl aim 22, wherein the transmitter means transmits the data based on a DVI standard or an HDMI standard.

24. A transmitter for transmitting a clock and data to a receiver, comprising:

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number); and

control means for stopping the transmission of the data from the transmitter means for a predetermined amount of time when switching the frequency of the clock from one to another,

wherein the control means is given in advance information on the receiver, and specifies the predetermined amount of time for which the transmission of the data is stopped based on the receiver information.

26. The transmitter of claim 24, wherein the transmitter means transmits the data based on a DVI standard or an HDMI standard.

25. The transmitter of cl aim 24, wherein the receiver information at least includes information on a manufacturer of the receiver.

27. A transmitter for transmitting a clock and data to a receiver, comprising:

transmitter means for transmitting a clock and data to a receiver via a transmission line, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number);

control means for stopping the transmission of the data from the transmitter means for a predetermined amount of time when switching the frequency of the clock from one to another; and

read-out means for reading out information on the receiver from the receiver via the transmission line,

wherein the control means specifies the predetermined amount of time for which the transmission of the data is stopped based on the receiver information read out by the read-out means.

28. The transmitter of claim 27, wherein the receiver information at least includes information on a manufacturer of the receiver.

29. The transmitter of claim 27, wherein the transmitter means transmits the data based on a DVI standard or an HDMI standard.

30. A transmitter/receiver, comprising:

a transmitter for transmitting a clock and data; and

a receiver for receiving the clock and the data transmitted from the transmitter, wherein;

the transmitter includes;

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number); and

control means for stopping the transmission of the data from the transmitter means for a first predetermined amount of time when switching the frequency of the clock from one to another; and

the receiver includes;

receiver means connected to the transmitter means via a transmission line; and

reconfiguration means for reconfiguring the receiver means upon detecting that the data received by the receiver means has stopped for a second predetermined amount of time.

31. The transmitter/receiver of claim 30, wherein the first predetermined amount of time is longer than the second predetermined amount of time.

32. The transmitter/receiver of claim 30, wherein the reconfiguration means provided in the receiver performs the reconfiguration by resetting the receiver means.

33. The transmitter/receiver of claim 30, wherein the transmitter means provided in the transmitter transmits the data based on a DVI standard or an HDMI standard.

34. A transmitter/receiver, comprising:

a transmitter for transmitting a clock and data; and

a receiver for receiving the clock and the data transmitted from the transmitter, wherein;

the transmitter includes;

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number); and

control means for stopping the transmission of the data from the transmitter means for a first predetermined amount of time when switching the frequency of the clock from one to another;

the receiver includes;

receiver means connected to the transmitter means via a transmission line; and

reconfiguration means for reconfiguring the receiver means upon detecting that the data received by the receiver means has stopped for a second predetermined amount of time; and

the control means provided in the transmitter is given in advance information on the receiver means provided in the receiver, and specifies the first predetermined amount of time for which the transmission of the data is stopped based on the receiver means information.

35. The transmitter/receiver of claim 34, wherein the first predetermined amount of time is longer than the second predetermined amount of time.

36. The transmitter/receiver of claim 34, wherein the reconfiguration means provided in the receiver performs the reconfiguration by resetting the receiver means.

37. The transmitter/receiver of claim 34, wherein the transmitter means provided in the transmitter transmits the data based on a DVI standard or an HDMI standard.

38. A transmitter/receiver, comprising:

a transmitter for transmitting a clock and data; and

a receiver for receiving the clock and the data transmitted from the transmitter, wherein;

the transmitter includes;

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number);

control means for stopping the transmission of the data from the transmitter means for a first predetermined amount of time when switching the frequency of the clock from one to another; and

read-out means for reading out information on the receiver;

the receiver includes;

receiver means connected to the transmitter means via a transmission line;

reconfiguration means for reconfiguring the receiver means upon detecting that the data received by the receiver means has stopped for a second predetermined amount of time; and

information storing means for storing information on the receiver means or the reconfiguration means;

the read-out means provided in the transmitter reads out the information stored in the information storing means; and

the control means provided in the transmitter specifies the first predetermined amount of time for which the transmission of the data is stopped based on the information stored in the information storing means and read out by the read-out means.

39. The transmitter/receiver of claim 38, wherein the information stored in the information storing means provided in the receiver at least includes information on a manufacturer of the receiver means or the reconfiguration means.

40. The transmitter/receiver of claim 38, wherein the first predetermined amount of time is longer than the second predetermined amount of time.

41. The transmitter/receiver of claim 38, wherein the reconfiguration means provided in the receiver performs the reconfiguration by resetting the receiver means.

42. The transmitter/receiver of claim 38, wherein the transmitter means provided in the transmitter transmits the data based on a DVI standard or an HDMI standard.

43. A transmitter for transmitting a clock and data to a receiver, comprising:

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number); and

control means for stopping the transmission of the clock and the data from the transmitter means for a predetermined amount of time when switching the frequency of the clock from one to another.

44. The transmitter of claim 43, wherein the transmitter means transmits the data based on a DVI standard or an HDMI standard.

45. A transmitter for transmitting a clock and data to a receiver, comprising:

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number); and

control means for stopping the transmission of the clock and the data from the transmitter means for a predetermined amount of time when switching the frequency of the clock from one to another,

wherein the control means is given in advance information on the receiver, and specifies the predetermined amount of time for which the transmission of the clock and the data is stopped based on the receiver information.

46. The transmitter of claim 45, wherein the receiver information at least includes information on a manufacturer of the receiver.

47. The transmitter of claim 45, wherein the transmitter means transmits the data based on a DVI standard or an HDMI standard.

48. A transmitter for transmitting a clock and data to a receiver, comprising:

transmitter means for transmitting a clock and data to a receiver via a transmission line, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number);

control means for stopping the transmission of the clock and the data from the transmitter means for a predetermined amount of time when switching the frequency of the clock from one to another; and

read-out means for reading out information on the receiver from the receiver via the transmission line,

wherein the control means specifies the predetermined amount of time for which the transmission of the clock and the data is stopped based on the receiver information read out by the read-out means.

49. The transmitter of claim 48, wherein the receiver information at least includes information on a manufacturer of the receiver.

50. The transmitter of claim 48, wherein the transmitter means transmits the data based on a DVI standard or an HDMI standard.

51. A transmitter/receiver, comprising:

a transmitter for transmitting a clock and data; and

a receiver for receiving the clock and the data transmitted from the transmitter, wherein;

the transmitter includes;

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number); and

control means for stopping the transmission of the clock and the data from the transmitter means for a first predetermined amount of time when switching the frequency of the clock from one to another; and

the receiver includes;

receiver means connected to the transmitter means via a transmission line; and

reconfiguration means for reconfiguring the receiver means upon detecting that the clock or the data received by the receiver means has stopped for a second predetermined amount of time.

52. The transmitter/receiver of claim 51, wherein the first predetermined amount of time is longer than the second predetermined amount of time.

53. The transmitter/receiver of claim 51, wherein the reconfiguration means provided in the receiver performs the reconfiguration by resetting the receiver means.

54. The transmitter/receiver of claim 51, wherein the transmitter means provided in the transmitter transmits the data based on a DVI standard or an HDMI standard.

55. A transmitter/receiver, comprising:

a transmitter for transmitting a clock and data; and

a receiver for receiving the clock and the data transmitted from the transmitter, wherein;

the transmitter includes;

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number); and

control means for stopping the transmission of the clock and the data from the transmitter means for a first predetermined amount of time when switching the frequency of the clock from one to another;

the receiver includes;

receiver means connected to the transmitter means via a transmission line; and

reconfiguration means for reconfiguring the receiver means upon detecting that the clock or the data received by the receiver means has stopped for a second predetermined amount of time; and

the control means provided in the transmitter is given in advance information on the receiver means provided in the receiver, and specifies the first predetermined amount of time for which the transmission of the data is stopped based on the receiver means information.

56. The transmitter/receiver of claim 55, wherein the first predetermined amount of time is longer than the second predetermined amount of time.

57. The transmitter/receiver of claim 55, wherein the reconfiguration means provided in the receiver performs the reconfiguration by resetting the receiver means.

58. The transmitter/receiver of claim 55, wherein the transmitter means provided in the transmitter transmits the data based on a DVI standard or an HDMI standard.

59. A transmitter/receiver, comprising:

a transmitter for transmitting a clock and data; and

a receiver for receiving the clock and the data transmitted from the transmitter, wherein;

the transmitter includes;

transmitter means for transmitting a clock and data, the data being in synchronism with another clock whose frequency is N times that of the clock (where N is a natural number);

control means for stopping the transmission of the clock and the data from the transmitter means for a first predetermined amount of time when switching the frequency of the clock from one to another; and

read-out means for reading out information on the receiver;

the receiver includes;

receiver means connected to the transmitter means via a transmission line;

reconfiguration means for reconfiguring the receiver means upon detecting that the clock or the data received by the receiver means has stopped for a second predetermined amount of time; and

information storing means for storing information on the receiver means or the reconfiguration means;

the read-out means provided in the transmitter reads out the information stored in the information storing means; and

the control means provided in the transmitter specifies the first predetermined amount of time for which the transmission of the clock and the data is stopped based on the information stored in the information storing means and read out by the read-out means.

60. The transmitter/receiver of claim 59, wherein the information stored in the information storing means provided in the receiver at least includes information on a manufacturer of the receiver means or the reconfiguration means.

61. The transmitter/receiver of claim 59, wherein the first predetermined amount of time is longer than the second predetermined amount of time.

62. The transmitter/receiver of claim 59, wherein the reconfiguration means provided in the receiver performs the reconfiguration by resetting the receiver means.

63. The transmitter/receiver of claim 59, wherein the transmitter means provided in the transmitter transmits the data based on a DVI standard or an HDMI standard.