Method for switching programs in digital broadcasting and digital broadcast receiving apparatus

Claim 1

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number, and wherein, on a receiving side, in changing program numbers from a first program number to a second program number, the method comprises the steps of: identifying a second physical channel number, for transmitting a second program having the second program number therethrough, based on the second program number; determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; and if it is determined that the first and the second physical channel numbers are not the same, switching so as to receive the physical channel having the identified second physical channel number.

Claim 2

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number, and wherein, on a receiving side, in changing program numbers from a first program number to a second program number, the method comprises the steps of: identifying a second physical channel number, for transmitting a second program having the second program number therethrough, based on the second program number; determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; and if it is determined that the first and the second physical channel numbers are not the same, switching so as to receive the physical channel having the identified second physical channel number.

Claim 3

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number, and wherein, on a receiving side, in changing program numbers from a first program number to a second program number, the method comprises the steps of: identifying a second physical channel number based on the second program number, for transmitting a second program having the second program number therethrough; determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; switching so as to receive the physical channel having the identified second physical channel number, if it is determined that the first and the second physical channel numbers are not the same; extracting a program map table packet identifier corresponding to the second program number from a program association table including the second program number; extracting an elementary packet identifier corresponding to the second program number from a program map table including the extracted program map table packet identifier; and extracting a packet having the extracted elementary packet identifier from a transport stream.

Claim 4

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number, and wherein, on a receiving side, in changing program numbers from a first program number to a second program number, the method comprises the steps of: identifying a second physical channel number based on the second program number, for transmitting a second program having the second program number therethrough; determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; switching so as to receive the physical channel having the identified second physical channel number, if it is determined that the first and the second physical channel numbers are not the same; extracting a program map table packet identifier corresponding to the second program number from a program association table including the second program number; extracting an elementary packet identifier corresponding to the second program number from a program map table including the extracted program map table packet identifier; and extracting a packet having the extracted elementary packet identifier from a transport stream.

Claim 5

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number and program association tables of all physical channels are transmitted as private data to transport streams of all of the physical channels, and wherein, on a receiving side, in changing program numbers from a first program number to a second program number, the method comprises the steps of: identifying a second physical channel number based on the second program number, for transmitting a second program having the second program number therethrough; determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; extracting a program map table packet identifier, corresponding to the second program number, from a program association table including the second program number, if it is determined that the first and the second physical channel numbers are the same; switching so as to receive the physical channel having the identified second physical number and simultaneously extracting a program map table packet identifier, corresponding to the second program number, from one of the program association tables which have been transmitted as private data, if it is determined that the first and the second physical channel numbers are not the same; extracting an elementary packet identifier, corresponding to the second program number, from a program map table including the extracted program map table packet identifier; and extracting a packet having the extracted elementary packet identifier from a transport stream.

Claim 6

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number and program association tables of all physical channels are transmitted as private data to transport streams of all of the physical channels, and wherein, on a receiving side, in changing program numbers from a first program number to a second program number, the method comprises the steps of: identifying a second physical channel number based on the second program number, for transmitting a second program having the second program number therethrough; determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; extracting a program map table packet identifier, corresponding to the second program number, from a program association table including the second program number, if it is determined that the first and the second physical channel numbers are the same; switching so as to receive the physical channel having the identified second physical number and simultaneously extracting a program map table packet identifier, corresponding to the second program number, from one of the program association tables which have been transmitted as private data, if it is determined that the first and the second physical channel numbers are not the same; extracting an elementary packet identifier, corresponding to the second program number, from a program map table including the extracted program map table packet identifier; and extracting a packet having the extracted elementary packet identifier from a transport stream.

Claim 7

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number and program association tables of all physical channels are transmitted as private data to transport streams of all of the physical channels, and wherein, on a receiving side, in changing program numbers from a first program number to a second program number, the method comprises the steps of: (a) identifying a second physical channel number based on the second program number for transmitting a second program having the second program number therethrough based on the second program number; (b) determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; (c) determining whether or not the physical channel having the identified second physical channel number satisfies a predetermined condition if it is determined that the first and the second physical channel numbers are not the same; (d) switching so as to receive the physical channel having the identified second physical channel number, if it is determined that the physical channel having the second physical channel number does not satisfy the predetermined condition; (e) extracting a program map table packet identifier, corresponding to the second program number, from a program association table including the second program number; (f) switching so as to receive the physical channel having the identified second physical channel number and simultaneously extracting a program map table packet identifier, corresponding to the second program number, from one of the program association tables which have been transmitted as private data, if it is determined that the physical channel having the second physical channel number satisfies the predetermined condition; (g) extracting an elementary packet identifier, corresponding to the second program number, from a program map table including the extracted program map table packet identifier; and (h) extracting a packet having the extracted elementary packet identifier from a transport stream.

Claim 8

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number and program association tables of all physical channels are transmitted as private data to transport streams of all of the physical channels, and wherein, on a receiving side, in changing program numbers from a first program number to a second program number, the method comprises the steps of: (a) identifying a second physical channel number based on the second program number for transmitting a second program having the second program number therethrough based on the second program number; (b) determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; (c) determining whether or not the physical channel having the identified second physical channel number satisfies a predetermined condition if it is determined that the first and the second physical channel numbers are not the same; (d) switching so as to receive the physical channel having the identified second physical channel number, if it is determined that the physical channel having the second physical channel number does not satisfy the predetermined condition; (e) extracting a program map table packet identifier, corresponding to the second program number, from a program association table including the second program number; (f) switching so as to receive the physical channel having the identified second physical channel number and simultaneously extracting a program map table packet identifier, corresponding to the second program number, from one of the program association tables which have been transmitted as private data, if it is determined that the physical channel having the second physical channel number satisfies the predetermined condition; (g) extracting an elementary packet identifier, corresponding to the second program number, from a program map table including the extracted program map table packet identifier; and (h) extracting a packet having the extracted elementary packet identifier from a transport stream.

Claim 16

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number and a program map table packet identifier corresponding to the program number in a program association table is assumed to be a fixed value, and wherein, on a receiving side, program association tables of all physical channels are stored into storage means and, in changing program numbers from a first program number into a second program number, the method comprises the steps of: identifying a second physical channel number based on the second program number for transmitting a second program having the second program number therethrough; determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; extracting a program map table packet identifier, corresponding to the second program number, from one of the program association tables which is stored in the storage means and includes the second program number, if it is determined that the first and the second physical channel numbers are the same; switching so as to receive the physical channel having the identified second physical channel number and simultaneously extracting a program map table packet identifier, corresponding to the second program number, from one of the program association tables which is stored in the storage means and includes the second program number, if it is determined that the first and the second physical channel numbers are not the same; extracting an elementary packet identifier, corresponding to the second program number, from a program map table including the extracted program map table packet identifier; and extracting a packet having the extracted elementary packet identifier from a transport stream.

Claim 17

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number and a program map table packet identifier corresponding to the program number in a program association table is assumed to be a fixed value, and wherein, on a receiving side, program association tables of all physical channels are stored into storage means and, in changing program numbers from a first program number into a second program number, the method comprises the steps of: identifying a second physical channel number based on the second program number for transmitting a second program having the second program number therethrough; determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; extracting a program map table packet identifier, corresponding to the second program number, from one of the program association tables which is stored in the storage means and includes the second program number, if it is determined that the first and the second physical channel numbers are the same; switching so as to receive the physical channel having the identified second physical channel number and simultaneously extracting a program map table packet identifier, corresponding to the second program number, from one of the program association tables which is stored in the storage means and includes the second program number, if it is determined that the first and the second physical channel numbers are not the same; extracting an elementary packet identifier, corresponding to the second program number, from a program map table including the extracted program map table packet identifier; and extracting a packet having the extracted elementary packet identifier from a transport stream.

Claim 18

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number and a program map table packet identifier corresponding to the program number in a program association table is assumed to be a fixed value, and wherein, on a receiving side, program association tables of physical channels satisfying a predetermined condition are stored in storage means and, in changing program numbers from a first program number to a second program number, the method comprises the steps of: (a) identifying a second physical channel number based on the second program number for transmitting a second program having the second program number therethrough; (b) determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; (c) determining whether or not the identified second physical channel number satisfies the predetermined condition if it is determined that the first and the second physical channel numbers are not the same; (d) switching so as to receive the physical channel having the identified second physical channel number, if it is determined that the second physical channel number does not satisfy the predetermined condition; (e) extracting a program map table packet identifier, corresponding to the second program number, from a program association table including the second program number after it has been determined that the first and the second physical channel numbers are the same in the step (b) or after the step (d) of switching for receiving the physical channel having the second physical channel number has been executed; (f) switching so as to receive the physical channel having the identified second physical channel number and simultaneously extracting a program map table packet identifier, corresponding to the second program number, from one of the program association tables which have been stored in the storage means, if it is determined that the second physical channel number satisfies the predetermined condition in the step (c); (g) extracting an elementary packet identifier, corresponding to the second program number, from a program map table including the extracted program map table packet identifier; and (h) extracting a packet having the extracted elementary packet identifier from a transport stream.

Claim 19

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number and a program map table packet identifier corresponding to the program number in a program association table is assumed to be a fixed value, and wherein, on a receiving side, program association tables of physical channels satisfying a predetermined condition are stored in storage means and, in changing program numbers from a first program number to a second program number, the method comprises the steps of: (a) identifying a second physical channel number based on the second program number for transmitting a second program having the second program number therethrough; (b) determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; (c) determining whether or not the identified second physical channel number satisfies the predetermined condition if it is determined that the first and the second physical channel numbers are not the same; (d) switching so as to receive the physical channel having the identified second physical channel number, if it is determined that the second physical channel number does not satisfy the predetermined condition; (e) extracting a program map table packet identifier, corresponding to the second program number, from a program association table including the second program number after it has been determined that the first and the second physical channel numbers are the same in the step (b) or after the step (d) of switching for receiving the physical channel having the second physical channel number has been executed; (f) switching so as to receive the physical channel having the identified second physical channel number and simultaneously extracting a program map table packet identifier, corresponding to the second program number, from one of the program association tables which have been stored in the storage means, if it is determined that the second physical channel number satisfies the predetermined condition in the step (c); (g) extracting an elementary packet identifier, corresponding to the second program number, from a program map table including the extracted program map table packet identifier; and (h) extracting a packet having the extracted elementary packet identifier from a transport stream.

Claim 24

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number and a packet identifier for a program map table on which an identifier of a packet or a component of the program having the program number is described is assigned to the other part of the program number, and wherein, on a receiving side, in changing program numbers from a first program number to a second program number, the method comprises the steps of: identifying a second physical channel number for transmitting a second program having the second program number therethrough and the packet identifier of the program map table based on the second program number; determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; switching so as to receive the physical channel having the identified second physical channel number if it is determined that the first and the second physical channel numbers are not the same; extracting an elementary packet identifier, corresponding to the second program number, from a program map table including the identified program map table packet identifier; and extracting a packet having the extracted elementary packet identifier from a transport stream.

Claim 25

A method for switching programs in a digital broadcasting wherein, on a transmission side, a physical channel number for transmitting a program having a program number therethrough is assigned to a part of the program number and a packet identifier for a program map table on which an identifier of a packet or a component of the program having the program number is described is assigned to the other part of the program number, and wherein, on a receiving side, in changing program numbers from a first program number to a second program number, the method comprises the steps of: identifying a second physical channel number for transmitting a second program having the second program number therethrough and the packet identifier of the program map table based on the second program number; determining whether or not the identified second physical channel number is the same as a first physical channel number which is now being received; switching so as to receive the physical channel having the identified second physical channel number if it is determined that the first and the second physical channel numbers are not the same; extracting an elementary packet identifier, corresponding to the second program number, from a program map table including the identified program map table packet identifier; and extracting a packet having the extracted elementary packet identifier from a transport stream.