1. A reproducing apparatus comprising:
a reproduction unit configured to transport a tape-shaped recording medium and to reproduce an image data string including coded image data from the tape-shaped recording medium, wherein the coded image data is coded for every frame using intraframe coding and interframe predictive coding selectively;
a memory storing the image data string reproduced by the reproduction unit;
a decoding unit configured to read and decode the image data string stored in the memory;
an instruction unit configured to generate an instruction to perform reproduction in one of a normal reproduction mode of reproducing the image data string at a normal reproduction speed and a slow reproduction mode of reproducing the image data string at a speed slower than the normal reproduction speed; and
a control unit configured to, responsive to the instruction from the instruction unit to perform reproduction in the slow reproduction mode, control the reproduction unit to reproduce the image data string while transporting the tape-shaped recording medium at a transport speed of the normal reproduction mode until a predetermined amount of the image data string is accumulated in the memory, and thereafter, to reproduce the image data string while transporting the tape-shaped recording medium at a transport speed corresponding to the slow reproduction mode.
2. A reproducing apparatus according to claim 1, wherein the image data string includes storage amount information concerning a data amount of image data that is required to be accumulated in the memory during decoding of the image data string, and
wherein the control unit determines a predetermined data amount of image data on the basis of the storage amount information reproduced by the reproduction unit.
3. A reproducing apparatus according to claim 2, wherein the control unit starts to accumulate the image data string in the memory beginning with image date of an intraframe-coded frame which is reproduced first after receiving the instruction to start the slow reproduction mode, and
wherein the control unit determines the predetermined data amount of the image data on the basis of the storage amount information on the intraframe-coded frame which is reproduced first.
4. A reproducing apparatus according to claim 2, wherein the control unit, after starting transporting the tape-shaped recording medium at a speed corresponding to the slow reproduction mode, adjusts a transport speed of the tape-shaped recording medium on the basis of a difference between an information amount determined on the basis of the storage amount information reproduced by the reproduction unit and an information amount of image data actually accumulated in the memory.
5. A reproducing apparatus according to claim 2, wherein the control unit adds auxiliary information including the storage amount information to the image data string in correspondence to intraframe-coded image data.
6. A reproducing apparatus comprising:
a reproduction unit configured to transport a tape-shaped recording medium and to reproduce an image data string including image data coded by an MPEG system from the tape-shaped recording medium;
a detecting unit configured to detect the coded image data from the image data string reproduced by the reproduction unit to store the coded image data in an image memory, and detect auxiliary information including VBV-Delay information of the image data to store the auxiliary information in an auxiliary information memory;
a decoding unit configured to read and decode the image data stored in, the image memory;
an instruction unit configured to generate an instruction to perform reproduction in one of a normal reproduction mode of reproducing image data at a normal reproduction speed and a slow reproduction mode of reproducing image data at a speed slower than the normal reproduction speed; and
a control unit configured to, responsive to the instruction from the instruction unit to start the slow reproduction mode, control the reproduction unit to reproduce the image data string while transporting the tape-shaped recording medium at a transport speed of the normal reproduction mode until a predetermined amount of the image data calculated from the VBV-Delay information stored in the auxiliary information memory is accumulated in the image memory, and thereafter, to reproduce the image data string while transporting the tape-shaped recording medium at a transport speed corresponding to the slow reproduction mode.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A projector comprising:
a case having a first ventilation opening for communicating an inner side with an outer side of the case;
a lamp unit disposed in the case, the lamp unit including a housing and a lamp body disposed in the housing, the housing having a second ventilation opening for communicating an inner side with an outer side of the housing; and
a barrier mechanism disposed on a path from the second ventilation opening to the first ventilation opening, the barrier mechanism including a first barrier member and a second barrier member,
the first barrier member having a first receiving plate facing the second ventilation opening,
the second barrier member having a second receiving plate disposed apart from the first receiving plate in a first direction to the second ventilation opening and disposed offset from the first receiving plate in a second direction crossing the first direction.
2. The projector according to claim 1, wherein
the second receiving plate is disposed offset from the first receiving plate toward the first ventilation opening.
3. The projector according to claim 1, wherein
the second barrier member is equipped with a blocking tab that protrudes from the second receiving plate in a direction opposite the first direction.
4. The projector according to claim 3 further comprising
a cover member configured to cover the lamp unit, the cover member having a third ventilation opening for communicating with the second ventilation opening of the housing.
5. The projector according to claim 4, wherein
the barrier mechanism further includes a third barrier member mounted to the cover member, the third barrier member having a first blocking plate that extends from an edge of the third ventilation opening toward the first receiving plate and blocks a gap space that opens in the second direction between the cover member and the second barrier member.
6. The projector according to claim 5, wherein
the third barrier member further having a second blocking plate that extends from the edge of the third ventilation opening toward the first receiving plate and blocks a gap space that opens in a direction perpendicular to the second direction between the cover member and the second barrier member.
7. The projector according to claim 6, wherein
the second direction is substantially parallel to an orientation of air at a place in the inner side of the case corresponding to the outer side of the housing.
8. The projector according to claim 7, wherein
the second direction is substantially parallel to the orientation of air at a place around the first receiving plate.
9. The projector according to claim 1, wherein
the first receiving plate is configured to repel and decelerate a fragment resulting from a damage to the lamp unit and flying out through the second ventilation opening, and
the second receiving plate is configured to receive and decelerate the fragment repelled by the first receiving plate.
10. The projector according to claim 9, wherein
the lamp unit further includes a reflector for reflecting light of the lamp body.