Video on demand transmission/reception method and system using divided transport stream
AssigneeIucf-Hyu (Industry-University Cooperation Foundation Hanyang University)
InventorsSung Kwon Park, Eun Jo Lee, Seong Min Joe
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Abstract
Provided are a video on demand (VOD) transmission/reception method and system using a divided transport stream (TS). The VOD transmission method includes setting a division coefficient for dividing a TS; dividing the TS into a unicast segment and multicast segments according to the division coefficient; and transmitting the unicast segment by using a unicast method and transmitting the multicast segments by using a multicast method.
Claims13
A video on demand (VOD) transmission method using a divided transport stream (TS), the VOD transmission method comprising:
- setting a division coefficient for dividing a TS;
- dividing the TS into a unicast segment and multicast segments according to the division coefficient, wherein a size of the unicast segment is always greater than a size of any one of the multicast segments;
- wherein the size of the multicast segment is determined by
- calculating a number of packets of the multicast segments by applying a truncation of decimal points on a value obtained by dividing a total number of the TS packets by the division coefficient;
- and
- calculating the multicast segment size by multiplying the number of packets of the multicast segments by a TS packet size;
- and
- transmitting the unicast segment in a unicast manner and transmitting the multicast segments in a multicast manner after transmitting the unicast segments in a unicast manner.
A video on demand (VOD) reception method using a divided transport stream (TS), the VOD reception method comprising:
- receiving a content transmission request;
- receiving a scheduling table from a transmission terminal;
- receiving a unicast segment from the transmission terminal;
- and
- receiving multicast segments from the transmission terminal after receiving a unicast segment from the transmission terminal;
- and
- wherein a size of the unicast segment is always greater than or equal to a size of any one of the multicast segments;
- and
- the size of each multicast segment is determined by
- calculating a number of packets of the multicast segments by applying a truncation of decimal points on a value obtained by dividing a total number of the TS packets by a division coefficient;
- and
- calculating the multicast segment size by multiplying the number of packets of the multicast segments by a TS packet size.
A video on demand (VOD) transmission system using a divided transport stream (TS), the VOD transmission system comprising:
- a division coefficient setting unit setting a division coefficient for dividing a TS;
- a segment size calculation unit calculating a unicast segment size and a multicast segment size for dividing the TS into a unicast segment and multicast segments according to the division coefficient, wherein the unicast segment size is always greater than the multicast segment size;
- wherein the size of the multicast segment is determined by
- calculating a number of packets of the multicast segments by applying a truncation of decimal points on a value obtained by dividing a total number of the TS packets by the division coefficient;
- and
- calculating the multicast segment size by multiplying the number of packets of the multicast segments by a TS packet size;
- and
- a segment transmission unit transmitting one or more divided segments by using a unicast method or a multicast method after transmitting the unicast segments in a unicast manner.
Dependencies are inferred from the claim text.