Voice/video information recording/reproducing device and method therefor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasanori Itoh, Masafumi Shimotashiro
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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasanori Itoh, Masafumi Shimotashiro
Estimating the term…
An audio/video information recording/reproducing device capable of easily implementing a post-recording function on an optical disk by using even a low-cost disk drive having a comparatively low-speed seek time. When recording a video file, it is recorded on an optical disk continuously for a duration equivalent to more than three times a seek time. When recording dubbing audio, it is recorded continuously only with constant data size at the same time with the reproducing of the recorded video file, thereby enabling concurrent real-time continuous reproducing and recording. Accordingly, concurrent reproductions of a video file and an audio file are ensured when reproducing dubbing audio.
(added) an audio/video information recording/reproducing device comprising:
(Added) An audio/video information recording/reproducing device comprising:
(Added) An audio/video information recording/reproducing device comprising:
(Added) An audio/video information recording/reproducing device comprising:
(Added) An audio/video information recording/reproducing device comprising:
(Added) An audio/video information recording/reproducing device comprising:
(Added) An audio/video information recording/reproducing device comprising:
(Added) An audio/video information recording/reproducing device comprising:
(Added) The audio/video information recording/reproducing device according to claim 1 or 2, wherein the period for writing in the first continuous data area for audio/video is equal to or more than a period for reading out the first audio/video information from the first continuous data area for audio/video.
(Added) The audio/video information recording/reproducing device according to claim 5 or 6, wherein the period for writing in the continuous data area for audio is equal to or more than a period for reading out the audio information from the continuous data area for audio.
(Added) The audio/video information recording/reproducing device according to claim 3 or 4,
(Added) An audio/video information recording/reproducing device comprising:
(Added) An audio/video information recording/reproducing device comprising:
(Added) An audio/video information recording/reproducing device comprising:
(Added) An audio/video information recording/reproducing device comprising:
(Added) A method for recording/reproducing audio/video information comprising:
(Added) A method for recording/reproducing audio/video information comprising:
(Added) A method for recording/reproducing audio/video information comprising:
(Added) A method for recording/reproducing audio/video information comprising:
(Added) A method for recording/reproducing audio/video information comprising:
(Added) A method for recording/reproducing audio/video information comprising:
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
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On discs: for continuous data, e.g. digitised analog information signals, pulse code modulated [PCM] data
Digital recording or reproducing: audio or video recording; Data buffering arrangements
Electronic editing of digitised analogue information signals, e.g. audio or video signals: insert-editing
Involving pulse code modulation of the colour picture signal components: involving data reduction
Term end not estimated
The present invention relates to an audio/video information recording/reproducing device and method compressing video signals and audio signals and recording the signals on a recording medium such as an optical disk.
System streams defined by the MPEG2 standard (ISO/IEC 13818-1) are used to compress video at a low bit rate. The following three types are defined as this system stream: program stream; transport stream; and PES stream.
On the other hand, optical disks such as phase-change optical disk (e.g., DVD-RAM or MVDISC) or magneto-optical disks (MO) have attracted attention as a recording medium replacing a magnetic tape. For example, VIDEO RECORDING standard (DVD Specifications for Rewritable/Re-recordable Discs Part 3 VIDEO RECORDING Version 1.0 September 1999) is one standard under which video is recorded on a DVD-RAM. This standard is used to record/reproduce video files constituted by program streams under the MPEG2 standard with respect to a DVD-RAM disk. Hereinafter, conventional techniques including the technique of the VIDEO RECORDING standard will be described by explaining the case where video files constituted by MPEG2 transport streams are recoded/reproduced with respect to a phase-change disk (hereinafter, referred to simply as “optical disk” as long as it is not confusing) instead. In the description below, video is compressed under the MPEG2 of ISO/IEC 13818-1, and audio is compressed under the MPEG2-AAC (Advanced Audio Coding) of ISO/IEC 13818-7.
FIG. 1 is a block diagram showing a functional configuration of an audio/video information recording/reproducing device according to Embodiment 1 of the present invention.
FIG. 2 is a block diagram relevant to post-recording mode recording in an audio/video information recording/reproducing device according to Embodiment 1 of the present invention.
FIG. 3 is a block diagram relevant to post-recording recording in an audio/video information recording/reproducing device according to Embodiment 1 of the present invention.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
(Embodiment 1)
FIG. 1 is a block diagram showing the configuration of an audio/video information recording/reproducing device according to Embodiment 1 of the present invention. This embodiment is different from the conventional example (FIG. 16) in that this embodiment has a second transport stream disassembling portion 166, and the functions of the continuous data area detecting portion 160, the recording control portion 161, the recording control portion 162 for post-recording, the reproducing control portion 163 for post-recording, and the buffer memory 164 are different. The data reading rate of the reproducing portion 121, the maximum reproduction rate of motion picture data input to a first transport stream disassembling portion 165, and the maximum movement time at the time of the reading operation and the writing operation of the pick-up 130 are the same as those of the conventional example.