TH15385B - Optical discs; methods and equipment for recording optical discs; and methods and equipment for reproducing optical discs. - Google Patents

Abstract

DC60 (09/03/44) A reproducible optical disc, where the reproducing device simultaneously reproduces still image and audio data. Still image data is stored in the video stream (ST1), which consists of several units, and audio data is stored in the second system stream (ST2), which consists of one or more units. These units store time-stamp information so that the second system stream (ST2) immediately follows the video stream (ST1). By changing the data in the second system stream (ST2), the audio data displayed with the still images can be easily and independently changed, even after recording the still images using the standard MPEG format. The data in the second system stream (ST2) allows the audio data displayed with still images to be easily and freely modified, even after the still image data has been saved, using the standard MPEG format.

Claims (21)

1. A repeatable optical disc, where the repeating device contains the decoder buffer (53, 57), the decoder (54,58), and the output section (55,56), is recorded in the optical disc where the video section stream (ST1), consisting of one or more units containing still image data for at least one image, and the audio section stream (ST2), consisting of one or more units containing audio data to be repeated with the still image data, are recorded in the optical disc where the time information indicates the time required for the decoding process and output. This time information includes the SCR2 interval indicating the time at which the last unit in the video section stream is input to the decoder buffer (53), and the SCR3 interval indicating the time at which the first unit in the audio section stream is input to the output section. The audio time is the input to the decoder buffer (57), and the time intervals SCR2 and SCR3 are determined by the following equation: SCR2 + Tp ≤ SCR3, where Tp is the time required from the start to the end of the input to the decoder buffer. 2. The optical disc as specified in claim 1, where the timing information is added to the SCR1 interval indicating the time at which the first unit in the video signal stream is input to the decoder buffer, and the SCR1 and SCR2 intervals are defined as follows: SCR1 = 0 SCR2 + Tp ≤ 27000000(27 MHz), where (27 MHz) indicates that the previously shown number is the count value of the 27 MHz clock signal. 3. The optical disc as specified in Claim 1, whereby the SCR3 time interval is defined as SCR3 = 27000000 (27MHz). 4. The optical disc as specified in claim 1, where the timestamp information shall include the PTS1 period which indicates the time at which the stream of the video signal is output from the output section (55,56), the PTS3 period which indicates the time at which the stream of the audio signal is output from the decoder (58), and the PTS1 and PTS3 periods shall be the same. 5. The optical disc as specified in claim 1, where the timestamp information shall include the DTS1 decoding start time, which indicates the time at which the decoder (53) begins decoding the video stream and the DTS1 time, shall be defined as DTS1=90000 (90 kHz), where (90 kHz) indicates the previously shown number as the count of the 90 kHz clock signal. 6. Optical discs as specified in claim 4, where the PTS1 and PTS3 time intervals are determined by the following equation: PTS1 = PTS3 = 90000 (90kHz) + Tv, where (90 kHz) indicates the preceding number as the count of the 90 kHz clock signal and Tv is the frame interval of the video data. 7. An optical disc as defined in Claim 1, where information management for the video and audio streams shall be recorded onto the optical disc, and information management for the video stream shall include identical flags to indicate that audio data is reproduced together with still image data. 8. Optical Disc Recorder: Used to record the system signal stream containing still image and audio data to be reproduced with the still image data onto a reproduceable optical disc. The reproducer has a buffer of the decoder (53,57), the decoder (54,58), and the output section (55,56). The optical disc recorder consists of an encoder (1204) and a system controller (1202). The encoder (1204) generates the video signal stream (ST1) containing one or more units containing still image data for at least one image, and the audio signal stream (ST2) containing one or more units containing audio data to be reproduced with the still image data. The encoder (1204) stores in these units timestamps indicating the time required for the decoding and output process, where the timestamps include the SCR2 timer indicating the time at which the last unit in the video signal stream is reached. It will be an input to the decoder buffer (53), and the SCR3 time interval indicates the time interval at which the first unit of the signal stream in the audio section will be an input to the decoder buffer (57), and such time intervals SCR 2 and SCR3 are determined by the following equation: SCR2 + Tp ≤ SCR 3, where Tp is the time required from the beginning to the end of providing one input to the decoder buffer. 9. The optical disc recording device as specified in claim 8, where the encoder shall retain the time information, is the SCR1 time period which indicates the time at which the first unit of the video section signal stream is input to the decoder buffer (53), and the PTS1 time period which indicates the time at which the video section signal stream is output from the output section (55,56), where the SCR1, SCR2 and PTS1 times are defined as follows: SCR1 = 0 SCR2 ≤ 27000000 (27 MHz) - Tp PTS1 = 90000 (90kHz) + Tv where (27 MHz) indicates the preceding number value as the clock signal count at 27 MHz (90 kHz) indicates the preceding number value. Tp is the time required to transfer the last unit of the video signal stream, and Tv is the frame interval of the video data. 10. The optical disc recording device as specified in claim 9, where the encoder will retain the time information, is the PTS3 interval which indicates the time at which the signal stream of the audio portion is output from the decoder (58), and the SCR3 and PTS3 intervals are defined as follows: SCR3 = 27000000 (27 MHz) PTS3 = 90000 (90 kHz) + Tv 11. An optical disc recording device as specified in claim 8, where the system controller will generate information management for the video and audio signal streams and will store information management for the video signal streams and the corresponding flag (audio_flag) to indicate that audio data is reproduced together with still image data. 12. An optical disc recording device as specified in claim 8, whereby the system controller records the playback time interval (playback cell time) for information management of the audio signal stream. 13. An optical disc reprogram is used to reproduce optical discs as described in Claim 7. Such optical disc reprogram consists of decoder buffers (53,57), decoders (54,58), output sections (55,56), and a system controller (51) in which, when the system controller (51) detects that an identical flag (Audio_flag) is assigned, the system controller (51) simultaneously reproduces the still image data in the video section signal stream and the audio data in the audio section signal stream. 14. An optical disc recording device as specified in claim 13, where, when the system controller (51) detects that an identical flag (audio_flag) has been assigned, the decoder (54) decodes a still image data recorded with the stream of the video section signal and sends the decoded data to the output sections (55,56). The decoder (58) decodes while repeating the audio data recorded with the stream of the audio section signal and displays the still image data from the output sections (55,56) which begins with the start of the audio display. 15. Optical disc recording method for recording a stream of system signals containing still image and audio data to be reproduced with still image data onto a reproduceable optical disc by a reproducer containing the decoder buffer (53,57), decoder (54,58), and output section (55,56). Such optical disc recording method consists of a step of recording the video stream (ST1) to record the video stream (ST1) containing a number of units containing still image data for at least one image; a step of recording the audio stream (ST2) to record the audio stream (ST2) containing one or more units containing audio data to be reproduced with still image data; and a step of recording time information to record time information indicating the time required for the decoding and output process to that unit, where the time information includes the SCR2 interval indicating the time at which the last unit in the video stream of the signal is completed. It is an input to the decoder buffer (53), and the time interval SCR 3 indicates the time at which the first unit of the signal stream in the audio section is an input to the decoder buffer (57), and such time intervals SCR2 and SCR3 are determined by the following equation: SCR2 + Tp ≤ SCR3, where Tp is the time required from the beginning to the end of the input of one unit to the decoder buffer. 16. The optical disc recording method as specified in claim 15, where the timing information shall continue to include the SCR1 period, which indicates the period at which the first unit of the video section signal stream is the input to the decoder buffer (53), and the PTS1 period, which indicates the period at which the video section signal stream is the output from the output section (55,56), where the SCR1, SCR2 and PTS1 periods shall be defined as follows: SCR1 = 0 SCR2 ≤ 27000000 (27 MHz) - Tp PTS1 = 90000 (90kHz) + Tv, where (27 MHz) indicates the preceding number value as the clock signal count at 27 MHz (90 kHz) indicates the preceding number value. Tp is the time required to transfer the last unit of the signal stream in the video segment, and Tv is the video data frame interval. 17. The optical disc recording method as specified in claim 16, where the timestamp information shall continue to include the PTS3 period which indicates the period at which the signal stream in the audio portion is output from the decoder (58), and the SCR3 and PTS3 periods shall be determined as follows: SCR3 = 27000000 (27 MHz) PTS3 = 90000 (90 kHz) + Tv 18. The optical recording method as specified in claim 15, which includes the recording procedure for information management, shall be used to record information management for video and audio streams and to generate information management for video streams, with similar flags (audio flags) indicating whether audio data is reproduced along with still image data. 19. The optical disc recording method as specified in claim 18, where the playback time (replayback cell time) shall be retained for information management of the audio signal stream. 20. Optical Disc Reproduction Method: To reproduce the recorded MPEG signal stream onto an optical disc as specified in Claim 7, the optical disc reproduction method shall consist of a measurement procedure to check for the presence of identical flags (audio_flags) to indicate that audio data has been reproduced along with the still image data specified in the still image information management for individual images, and a playback procedure to record the still image and audio data based on the detection of identical flags (audio_flags). 21. The optical reproduction method of the disc as specified in claim 20, where the playback procedure to reproduce still images and audio data simultaneously consists of a decoding procedure to decode still images for one image based on the detection of matching flags (audio_flags), and a reproduction procedure to decode and reproduce audio data, where the reproduction of the decoded still images begins simultaneously with the start of the audio playback.