US 2009/0263104 A1 · STREAM PLAYBACK CONTROL DEVICE

Abstract

Time information for restoring the playback rate is affixed to a plurality of packets included in a stream. A predetermined number of such packets are stored in advance in a buffer memory 9. A packet arrival time detection section 5 detects the input time of a reference-time packet (packet having arrived first at the start of stream playback). A time correction section 7 loads the input time of the reference-time packet into a time counter ≢after a lapse of a predetermined time. A comparison section 8 compares the time information of each packet stored in the buffer memory 9 with the time measured from the loaded input time in the time counter 6 and, if the two values agree, outputs the packet in question to a packet processing section 12. Thus, even under circumstances causing fluctuations in the transfer time of a stream from the recording medium and the like, underflow in rate reproduction of the stream is less prone to occur.

Claims10

Dependent claims

A stream playback control device for reproducing the rate of a stream including a plurality of packets having time information for restoring a playback rate affixed thereto, comprising:

a stream input control section for controlling input of a stream into the stream playback control device;
a buffer memory for temporarily holding a plurality of packets having time information inputted into the stream playback control device;
a time counter for counting up in a specific time cycle;
a time correction section for loading time information of a packet inputted at a predetermined reference time point into the time counter after a lapse of a predetermined time from the timing of input of the packet;
and
a comparison section for comparing a count value of the time counter with time information of each packet held in the buffer memory,
wherein the rate of the stream is reproduced by restoring each packet interval of the stream based on the comparison results of the comparison section.

4 more elements

A stream playback control device for reproducing the rate of a stream including a plurality of packets having time information for restoring a playback rate affixed thereto, comprising:

a stream input control section for controlling input of a plurality of different streams into the stream playback control device under packet-unit time division multiplexing transmission;
a buffer memory for temporarily holding a plurality of packets having time information inputted into the stream playback control device, stream identification information being affixed to each of the plurality of packets;
a time counter provided for each of the plurality of streams for counting up in a specific time cycle;
a time correction section provided for each of the plurality of streams for loading time information of a packet having a predetermined reference time after a lapse of a predetermined time from input of the packet having the predetermined reference time;
and
a comparison section provided for each of the plurality of streams for comparing a count value of the time counter with time information of each packet held in the buffer memory,
wherein the rate of each of the streams is reproduced by restoring the packet interval of the stream based on the comparison results of each of the comparison sections.

4 more elements

Dependencies are inferred from the claim text.

Stream playback control device

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Stream playback control device

Life of this patent

Abstract

Claims10