Broadcasting system and reception apparatus
View Patent ↗A broadcasting system 1 provides a digital content to be broadcast with an attribute vector A thereof. A filter 12 is assigned with a selection vector S indicating user's taste. The filter 12 performs a standardized inner product operation between the selection vector S and the attribute vector A for selecting and recording broadcast programs. A = ( a 1 , a 2 , a 3 , … , a n ) S = ( s 1 , s 2 , s 3 , … , s n ) P = A · S A S
1. A distributing system comprising:
a distributing station for distributing digital contents and attribute information indicating an attribute of said contents; and
a plurality of reception apparatuses having:
reception means for receiving said digital contents and said attribute information distributed from the distributing station,
output means for outputting the received digital contents, and
selection means for allowing a user to select the digital contents, wherein the digital contents are processed in a filtering process by comparing selection information indicating user preferences with attribute information assigned to the digital contents,
said selection information being expressed with an n-dimensional vector S comprising user preference items as elements,
wherein each element identifies a preference intensity,
wherein an element of vector S identities a positive value as a preference intensity when the user has demonstrated a positive preference for the element and identifies a negative value as a preference intensity when the user has demonstrated a negative preference for the element, and
wherein the filtering process comprises: (1) a performing process for performing a calculation between a vector A related to the attribute information and the vector S; and (2) a determining process for determining whether to select the digital content based on the result of the calculation,
wherein Vector S is generated by using Vector A for a program which is reproduced for a specified period of time or longer, and
wherein vector S is generated by changing a weighting factor for a reserved program and a realtime reproduced program.
2. A reception apparatus comprising:
reception means for receiving digital contents and attribute information from a content provider;
output means for outputting the received digital content; and
selection means for allowing a user to select the digital contents, wherein the digital contents are processed in a filtering process by comparing selection information indicating user preferences with attribute information related to the digital content,
said selection information being expressed with an n-dimensional vector S comprising user preference items as elements,
wherein each element identifies a preference intensity,
wherein an element of vector S identifies a positive value as a preference intensity when the user has demonstrated a positive preference for the element and indentifies a negative value as a preference intensity when the user has demonstrated a negative preference for the element, and
wherein the filtering process comprises a performing process that performs a calculation between a vector A related to the attribute information and the vector S, and a determining process that determines whether to select the digital content based on the result of the calculation,
wherein Vector S is generated by using Vector A for a program which is reproduced for a specified period of time or longer, and
wherein vector S is generated by changing a weighting factor for a reserved program and a realtime reproduced program.
3. The reception apparatus according to claim 2 , wherein said selection means finds a selection value P based on the following equation and selects the digital content based on a size of the selection value P as follows:
A
=
(
a
1
,
a
2
,
a
3
,
…
,
an
)
S
=
(
s
1
,
s
2
,
s
3
,
…
,
sn
)
P
=
A
·
S
A
·
S
where
A
·
S
=
∑
k
=
1
n
a
k
S
k
A
=
∑
k
=
1
n
a
k
2
S
=
∑
k
=
1
n
S
k
2
in which neither A nor S is a zero vector.
4. The reception apparatus according to claim 2 , wherein said selection information's vector S is found from a vector A of attribute information attached to a plurality of digital contents selected by the user.
5. The reception apparatus according to claim 4 , wherein said selection information's vector S is found according to the following equation:
S
=
1
M
∑
k
=
1
M
A
k
where M is assumed to be a number of digital contents selected by the user and an attribute vector for the K-th digital content selected by the user is assumed to be: Ak=a1k, a2k, a3k, . . . , ank).
6. The reception apparatus according to claim 4 , wherein said selection information's vector S is found according to the following equation:
S
=
1
M
∑
k
=
L
-
M
+
1
L
A
k
where M is assumed to be a number of windows for finding a vector S, L is assumed to be a start point for selecting the plurality of digital contents for finding the vector S, and an attribute vector for the K-th digital content selected by the user is assumed to be: Ak=(a1k, a2k, a3k, . . . , ank).
7. The reception apparatus according to claim 4 , wherein said selection information's vector S is found by averaging vectors A for attribute information attached to the plurality of digital contents reproduced by the user for a specified time.
8. The reception apparatus according to claim 4 , wherein said selection information's vector S is found by averaging vectors A for attribute information attached to the plurality of digital contents reserved by the user.
9. The reception apparatus according to claim 4 , wherein said selection information's vector S is found by averaging vectors A for attribute information attached to the plurality of digital contents reproduced by the user for a specified time, averaging vectors A for attribute information attached to the plurality of digital contents reserved by the user, assigning a weight to each average, and combining the weights.
10. The reception apparatus according to claim 2 , wherein said selection means selects the digital content based on a vector S of the selection information corresponding to a plurality of users.
11. A reception method comprising:
receiving digital contents and attribute information from a content provider;
outputting the received digital content;
allowing a user to select the digital contents, wherein the digital contents are processed in a filtering process by comparing selection information indicating user preferences with attribute information related to the digital content;
expressing the selection information with an n-dimensional vector S comprising user preference items as elements,
identifying a preference intensity for each element
wherein an element of vector S identifies a positive value as a preference intensity when the user has demonstrated a positive preference for the element and indentifies a negative value as a preference intensity when the user has demonstrated a negative preference for the element,
performing a calculation between a vector A related to the attribute information and the vector S; and
determining, based on the calculation, whether to select the digital content,
wherein Vector S is generated by using Vector A for a program which is reproduced for a specified period of time or longer, and
wherein vector S is generated by changing a weighting factor for a reserved program and a realtime reproduced program.
12. A reception apparatus comprising:
a receiver configured to receive digital contents and attribute information from a content provider;
an output configured to output the received digital content; and
a selector configured to allow a user to filter the digital contents by comparing selection information indicating user preferences with attribute information related to the digital content,
said selection information being expressed with an n-dimensional vector S comprising user preference items as elements,
wherein each element identifies a preference intensity,
wherein an element of vector S identifies a positive value as a preference intensity when the user has demonstrated a positive preference for the element and identifies a negative value as a preference intensity when the user has demonstrated a negative preference for the element,
wherein a calculation is performed between a vector A related to the attribute information and the vector S and the result of the calculation is used to determine whether to select the digital content, and
wherein Vector S is generated by using Vector A for a program which is reproduced for a specified period of time or longer, and
wherein vector S is generated by changing a weighting factor for a reserved program and a realtime reproduced program.