Time stamp value controller

Abstract

There is provided a timestamp value controlling apparatus that can improve storage efficiency of data as maintaining quality of data. In the apparatus, a timestamp value difference calculating section 103 obtains a timestamp value difference indicating a difference between an input timestamp value and a previous timestamp value timestamp value. A judging section 104 judges whether the timestamp value difference is within a reference timestamp value range in which a predetermined permissible range is added to the reference frame interval value. The outputting and selecting section 105 outputs a value, which is obtained by adding the reference frame interval value to the previous timestamp value, as an output timestamp value when the timestamp value difference is within a reference timestamp value range, and outputs the input timestamp value as an output timestamp value when the timestamp value difference is out of the reference timestamp value range.

Description

technical field [0001] The present invention relates to a time stamp value control device used in a multimedia processing device or a moving image processing device. Background technique [0002] Typically, A / V (audio / video) data is stored in a recording device, typically a digital video camera. As a format for storing AV data, there is a DV (Digital Video) format which stores the AV data in a DV cassette tape, or an AVI format which can be selected when capturing an input moving image on a personal computer (PC). Furthermore, in recent years, AV transmission using ITU-T / H.324 typified by TV headphones has been performed. [0003] Usually, a representation time (reproduction time / decoding time) is added to each frame of AV data (one picture in the case of video and a fixed time in the case of audio) at the time when data of these formats is stored. According to the storage format, one case is to add the representation time to each frame, another case is the representation ...

AI Technical Summary

Problems solved by technology

[0007] However, in the aforementioned devices that cannot control the frame rate and devices that can only provide representation times with fixed intervals (20 microsecond intervals, etc.) to the generated AV data frames, if the described Multiplexing, the representation time information storage table will increase, resulting in a decrease in storage efficiency

Furthermore, in this conventional recording apparatus, if a representation time different from that of each frame is added so as to keep the representation time information storage table to a minimum, out-of-sync or sound jumps will occur, thereby reducing the Quality of performance when reproduced

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