What is claimed is:
1. An information storage medium, comprising:
multi-streams;
interactive contents comprising information that enables an interface with a user; and
reproduction control information comprising conversion information to convert the multi-streams andor the interactive contents into digital television (DTV) streams.
2. The information storage medium of claim 1, wherein the multi-streams comprise a moving picture experts group-2 program stream (MPEG-2 PS), an MPEG-4 format stream, an MPEG-7 format stream, andor a Wavelet transform format stream.
3. The information storage medium of claim 1, wherein the reproduction control information further comprises:
identification information identifying the multi-streams from the interactive contents to perform a DTV stream conversion; and
control information controlling a generation of the DTV streams.
4. The information storage medium of claim 1, wherein the reproduction control information further comprises management information and search information to reproduce the multi-streams and the interactive contents.
5. The information storage medium of claim 4, wherein the reproduction control information further comprises:
information on types of the multi-streams and the interactive contents;
time information to synchronously reproduce and synchronously convert the multi-streams and the interactive contents;
time information to independently reproduce and independently convert the multi-streams and the interactive contents;
parental ranking information on the multi-streams and the interactive contents;
additional information on start times, reproduction periods, and titles of the multi-streams and the interactive contents; and
information of detailed descriptions of the multi-streams and the interactive contents.
6. A method of reproducing data recorded on an information storage medium of a DTV, the method comprising:
reading out multi-streams, interactive contents, and reproduction control information from the information storage medium having conversion information to convert the multi-streams andor the interactive contents into DTV streams;
converting the read-out multi-streams into transport streams appropriate to the DTV;
converting the read-out interactive contents into DTV interactive contents; and
multiplexing the transport streams and the DTV interactive contents based on the read-out reproduction control information to generate DTV streams.
7. The method of claim 6, wherein the multi-streams comprise an MPEG-2 PS, an MPEG-4 format stream, an MPEG-7 format stream, andor a Wavelet transform format stream.
8. The method of claim 7, wherein the MPEG-2 PS is converted into an MPEG-2 TS during the conversion of the-transport streams.
9. The method of claim 8, wherein converting the transport streams comprises:
parsing a pack and a packetized elementary stream (PES) of read-out PS data to extract a video elementary stream (ES) and an audio ES, to extract a system clock reference (SCR) from the pack and to extract presentation time stampdecoding time stamp (PTSDTS) from a PES header;
assigning the PES header to the video ES and the audio ES;
inserting a proper time stamp based on the PTSDTS;
setting an internal timer to be an SCR value of an initial pack;
generating a time control signal by determining a time alignment based on the SCR value of a sequential pack;
sampling a program clock reference (PCR) obtained using the SCR to generate a program specific information (PSI) packet period signal and a PCR insertion period signal;
generating AV packets using a result of inserting the time stamp according to the PCR insertion period signal, and generating program association table (PAT) packets, program map table (PMT) packets, and Null packets;
scheduling the AV packets, the PAT packets, the PMT packets, and the Null packets, while a time control of the AV packets is determined based on the time control signal, and the PAT packets and the PMT packets are alternately scheduled whenever the PSI packet period signals are generated; and
multiplexing the AV packets, the PAT packets, the PMT packets, and the Null packets to generate the MPEG-2 TS.
10. The method of claim 6, wherein converting the DTV interactive contents comprises:
checking a validation of the interactive contents comprising a source document, which is recorded on the information storage medium; and
when the source document is validated, converting comments, process indicators, document type declarations, start tags, end tags, named character references, numeric character references, marked sections, and parsed character data in the source document into a DTV document format to generate a target document comprising the DTV interactive contents.
11. The method of claim 9, wherein generating the DTV streams comprises:
converting the transport streams and the DTV interactive contents into a digital storage media command and control (DSM-CC) standard to generate a DSM-CC message;
forming program and system information protocol (PSIP) information by using information related to a DTV stream conversion in the reproduction control information, and PAT and PMT information;
converting the PSIP information into a PSIP private section; and
multiplexing the PSIP private section and the DSM-CC message with the MPEG-2 TS to generate the DTV streams.
12. An optical recordingreproducing apparatus to reproduce data recorded on an information recording medium on a DTV, the apparatus comprising:
a read-out unit reading out multi-streams, interactive contents, and reproduction control information from the information storage medium having conversion information to convert the multi-streams andor the interactive contents into DTV streams;
a first transcoder converting the multi-streams read-out by the read-out unit into transport streams appropriate to the DTV;
a second transcoder converting the interactive contents read out by the read-out unit into DTV interactive contents; and
a generator multiplexing the transport streams and the DTV interactive contents and generating DTV streams according to the reproduction control information read out by the read-out unit.
13. The apparatus of claim 12, further comprising:
a digital interface interfacing the DTV streams generated by the generator to transfer to the DTV.
14. The apparatus of claim 12, wherein the multi-streams comprise an MPEG-2 PS, an MPEG-4 format stream, an MPEG-7 stream, andor a Wavelet transform format stream.
15. The apparatus of claim 14, wherein the first transcoder converts the MPEG-2 PS into an MPEG-2 TS.
16. The apparatus of claim 15, wherein the first transcoder comprises:
a PS parse and demultiplex unit parsing a pack and a PES in PS data read out by the read-out unit to extract a video ES and an audio ES, an SCR from the pack, and PTSDTS from a PES header;
a video rearranger searching a sequence start code and a picture start code in the video ES output from the PS parse and demultiplex unit to generate a first recognition signal by access unit and to extract the PTSDTS;
an audio rearranger obtaining a frame size according to audio synchronization information in the audio ES output from the PS parse and demultiplex unit to generate a second recognition signal by access unit and to extract the PTS;
a PES packetizer assigning the PES header to the outputs of the video rearranger and the audio rearranger according to the first and second recognition signals, and inserting time stamps, which are obtained based on the PTSDTS extracted by the video rearranger;
a time controller determining a time alignment of an AV packet by using an SCR value following the SCR value of an initial pack provided from the PS parse and demultiplex unit to generate a time control signal, and generating a PSI packet period signal and a PCR insertion period signal by sampling the PCR that is obtained using the SCR value;
an AV packet generator generating the AV packets from the output of the PES packetizer according to the PCR insertion period signal;
a PAT packet generator generating PAT packets;
a PMT generator generating PMT packets;
a Null packet generator generating Null packets;
a TS packet scheduler generating a packet selection signal and schedules the AV packets, the PAT packets, the PMT packets, and the Null packets, wherein the time control of the AV packets is determined according to a presence of the time control signal, and the PAT packets and the PMT packets are alternately scheduled when the PSI packet period signals are generated; and
a TS multiplexer multiplexing the AV packets, the PAT packets, the PMT packets, and the Null packets according to the packet selection signal to output the MPEG-2 TS.
17. The apparatus of claim 16, wherein a priority of the TS packet scheduler comprises the AV packets being at a higher priority than the PAT packets and the PMT packets being at a higher priority than the Null packets
18. The apparatus of claim 12, wherein a validation of a source document comprising the interactive contents recorded on the information storage medium, is checked in the second transcoder, and if the source document is validated, comments, process indicators, document type declarations, start tags, end tags, named character references, numeric character references, marked sections, and parsed character data are converted into a DTV document format to generate a target document comprising DTV interactive contents.
19. The apparatus of claim 16, wherein the generator converts the transport streams generated by the first transcorder and the DTV interactive streams generated by the second transcoder into a DSM-CC standard to generate a DSM-CC message, forms PSIP information using information on the DTV stream conversion in the reproduction control information, and the PAT and PMT information generated by the second transcoder, converts the PSIP information into a PSIP private section, and generates the DTV streams by multiplexing the PSIP private section and the DSM-CC message with the MPEG-2 TS output from the TS multiplexer.
20. An apparatus to convert information stored in an information storage medium to DTV streams, comprising:
a read-out unit reading out the information recorded on the information storage medium comprising multi-streams, interactive contents, and navigation information;
a signal processing unit processing the read-out information into reproduction signals;
a first transcoder converting the multi-streams into transport streams;
a second transcoder converting the interactive contents into DTV interactive contents;
a DTV-stream generator generating DTV streams using the transport streams and the DTV interactive contents; and
a navigation engine controlling the DTV-stream generator based on the navigation information.
21. The apparatus of claim 20, further comprising:
a digital interface receiving the DTV streams from the DTV-stream generator and enabling data to be input bi-directionally.
22. The apparatus of claim 20, wherein the digital interface comprises a user-to-user (UU) interface or a user-to-network (UN) interface.
23. The apparatus of claim 20, wherein the multi-streams comprise audio andor video (AV) stream and subpicture data, where the AV stream has a transport format comprising at least one of moving picture experts group-2 program stream (MPEG-2 PS), MPEG-4, MPEG-7, or a wavelet transform.
24. The apparatus of claim 20, wherein the interactive contents comprises HTML, XHTML, or XML, and joint photographic experts group (JPEG) and portable network graphics (PNG) files.
25. The apparatus of claim 20, wherein the reproduction control information comprises:
reproduction information comprising management information and search information to reproduce the multi-streams and the interactive contents, and conversion information to convert the multi-streams and the interactive contents into DTV streams,
information on a relationship between the multi-streams and the interactive contents in order for the multi-streams and the interactive contents to be converted synchronously and in relation to each other, and
information to distinguish the multi-streams from the interactive contents and control information to control the generation of the DTV streams.
26. The apparatus of claim 20, wherein the navigation information comprises information on types of the multi-streams and the interactive contents, time information to synchronously reproduce and synchronously convert the multi-streams and the interactive contents, time information to independently reproduce and independently convert the multi-streams and the interactive contents parental ranking information on the multi-streams and the interactive contents, information on a start time, reproduction period, and titles of the multi-streams and the interactive contents, and information on detailed descriptions of the multi-streams and the interactive contents.
27. The apparatus of claim 20, wherein the DTV stream generator
converts the DTV interactive contents into data following a digital storage media command and controls a (DSM-CC) standard to generate a DSM-CC message, and
forms program and system information protocol (PSIP) information by using the conversion information, and program association table (PAT) information and program map table (PMT) information generated in the first transcoder.
28. The apparatus of claim 27, wherein the PSIP information is converted into a private section and the private section and the DSM-CC message are multiplexed with the transport streams to generate the DTV streams.
29. The apparatus of claim 20, wherein the second transcoder converts the interactive contents into DTV interactive contents by validating a source document in the interactive contents and, if the source document is validated, comments, process indicators, document type declarations, start tags, end tags, named character references, numeric character references, marked sections, and parsed character data (PCDATA) contents in the source document are converted according to a DTV-HTML format.
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 light scanning device comprising:
a light source which emits light;
a frame which supports the light source;
an oscillating mirror which rotationally oscillates about a first axis to reflect the light emitted from the light source;
a mirror holder which holds the oscillating mirror;
a beam member which extends in a first direction orthogonal to the first axis and which is longer than the mirror holder in the first direction;
a first fixing member which fixes the mirror holder to the beam member; and
a second fixing member which fixes the beam member to the frame.
2. The light scanning device according to claim 1,
wherein the second fixing member fixes the beam member to the frame movably in the first direction,
the light scanning device further comprising an adjustment member which adjusts a position of the beam member in the first direction on the frame by pressing an end portion of the beam member.
3. The light scanning device according to claim 2,
wherein the adjustment member is disposed at one end of the beam member to be movable in a second direction different from the first direction, and
wherein the beam member includes a pressed face which is inclined with respect to the second direction and which contacts with the adjustment member,
the light scanning device further comprising a first elastic member which is disposed at the other end of the beam member and presses the beam member to the one end of the beam member.
4. The light scanning device according to claim 3,
wherein the second direction is parallel to the first axis.
5. The light scanning device according to claim 3,
wherein the second direction is inclined with respect to the first axis, and
wherein the pressed face is parallel to the first axis.
6. The light scanning device according to claim 2,
wherein the adjustment member includes an eccentric cam.
7. The light scanning device according to claim 3,
wherein the adjustment member includes a screw.
8. The light scanning device according to claim 2,
wherein the second fixing member fixes the beam member to the frame at two portions which becomes nodes of a primary natural oscillation of the beam member.
9. The light scanning device according to claim 2,
wherein the second fixing member includes a second elastic member which is used to sandwich and hold the beam member.
10. The light scanning device according to claim 9,
wherein the second fixing member includes a base which includes:
first and second projections which are arranged in parallel with the first axis; and
a third projection arranged opposite from the first and second projections with respect to the oscillating mirror, and
wherein the second elastic member sandwiches and holds the beam member with the first to third projections between the second elastic member and the first to third projections.
11. The light scanning device according to claim 10,
wherein at least one of the first and second projections is configured to be movable along a pressing direction of the second elastic member.
12. The light scanning device according to claim 10,
wherein the third projections is configured to be movable along a pressing direction of the second elastic member.
13. The light scanning device according to claim 2,
wherein second fixing member further includes a presser part which presses the beam member to the frame.
14. The light scanning device according to claim 10,
wherein the beam member is provided with a concave portion where the mirror holder is disposed so that the first axis is positioned on a plane defined with the first to third projections.
15. The light scanning device according to claim 2,
wherein the first fixing member includes an opening through which light incident to the oscillating mirror and light reflected by the oscillating mirror pass.
16. The light scanning device according to claim 2,
wherein the beam member includes an opening through which light incident to the oscillating mirror and light reflected by the oscillating mirror pass.
17. The light scanning device according to claim 1,
wherein the second fixing member fixes the beam member to the frame at two portions which becomes nodes of a primary natural oscillation of the beam member.
18. The light scanning device according to claim 17,
wherein the second fixing member fixes the beam member to the frame at two portions which becomes nodes of a secondary natural oscillation of the beam member.
19. The light scanning device according to claim 17,
wherein the second fixing member includes a third elastic member which is used to sandwich and hold the beam member.
20. The light scanning device according to claim 19,
wherein the second fixing member includes a base which includes first to third projections which contact with the beam member; and
wherein the third elastic member sandwiches and holds the beam member with the first to third projections between the third elastic member and the first to third projections.
21. The light scanning device according to claim 20,
wherein the base includes first and second bases, and
wherein the first and second projections are provided on the first base and the third projection are provided on the second base.
22. The light scanning device according to claim 20,
wherein at least one of the first and second projections is configured to be movable along a pressing direction of the third elastic member.
23. The light scanning device according to claim 1,
wherein the first fixing member includes a presser part which presses the mirror holder to be fixed to the beam member.
24. The light scanning device according to claim 23,
wherein the beam member includes a supporting projection which supports the mirror holder and allows the mirror holder to tilt about a second axis in parallel with the first axis, and
wherein the presser part of the first fixing member includes:
a first presser part which is elastically deformable and which presses the mirror holder at one side thereof;
a second presser part which is elastically deformable and movable in the first direction and which presses the mirror holder at the other side thereof with respect to the second axis.
25. The light scanning device according to claim 24,
wherein the first fixing member further includes an engagement part which is engaged with the mirror holder and positions the mirror holder in a direction parallel to the first axis.
26. The light scanning device according to claim 24,
wherein the presser part of the first fixing member further includes a third presser part which is elastically deformable and which contacts with the mirror holder at a position rear from the second axis.
27. The light scanning device according to claim 22, wherein the beam member is provided with a concave portion where the mirror holder is disposed so that the first axis is positioned on a plane defined with the first to third projections.