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An MPEG-2 digital TV headend and settop box includes a method and apparatus for enabling the presentation of electronic program guide (EPG) information. Television program guide information is downloaded from a source of television programming data to the headend of the TV broadcast system. The down

An MPEG-2 digital TV headend and settop box includes a method and apparatus for enabling the presentation of electronic program guide (EPG) information. Television program guide information is downloaded from a source of television programming data to the headend of the TV broadcast system. The downloaded EPG data is translated into a plurality of HTML Web pages, which are continuously transmitted as a rotating data carousel in an MPEG-2 data stream. The digital TV settop box further includes a general-purpose web browser responsive to viewer commands to select and display a selected web page from the rotating carousel of HTML web pages. The digital TV settop further includes a data cache for downloading and storing partial HTML web page EPG information in advance, which reduces the necessary bandwidth allocated for the EPG information, and allows the settop box to quickly display the basic information for a channel related program guide.

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An MPEG-2 digital TV headend and settop box includes a method and apparatus for enabling the presentation of electronic program guide (EPG) information. Television program guide information is downloaded from a source of television programming data to the headend of the TV broadcast system. The down

An MPEG-2 digital TV headend and settop box includes a method and apparatus for enabling the presentation of electronic program guide (EPG) information. Television program guide information is downloaded from a source of television programming data to the headend of the TV broadcast system. The downloaded EPG data is translated into a plurality of HTML Web pages, which are continuously transmitted as a rotating data carousel in an MPEG-2 data stream. The digital TV settop box further includes a general-purpose web browser responsive to viewer commands to select and display a selected web page from the rotating carousel of HTML web pages. The digital TV settop further includes a data cache for downloading and storing partial HTML web page EPG information in advance, which reduces the necessary bandwidth allocated for the EPG information, and allows the settop box to quickly display the basic information for a channel related program guide. ions for conversion logic for converting data into converted data; and based on the conversion logic, generating computer program instructions for balancing logic that balances the data in the source system with the converted data in the target system to ensure that the converting has been properly performed by the conversion logic. 2. The method of claim 1, wherein the generating steps are performed by a single tool. 3. The method of claim 1, wherein the balancing logic is generated without input from a user of the data conversion system regarding how to balance the data in the source system with data in the target system. 4. The method of claim 1, wherein the conversion logic converts data from a first format to a second format. 5. The method of claim 1, wherein the conversion logic renames fields in the data. 6. The method of claim 1, wherein the conversion logic modifies data types of at least some of the data. 7. The method of claim 1, wherein the balancing logic compares the data from the source system with the converted data for the target system. 8. In a data conversion system for converting data from a source system into an acceptable format for a target system, said data conversion system including at least one computer system, said computer system including a medium holding computer-executable steps for performing a method, said method comprising the steps of: generating computer program instructions for conversion logic for converting data into converted data; and based on the conversion logic, generating computer program instructions for balancing logic that balances the data in the source system with the converted data in the target system to ensure that the converting has been properly performed by the conversion logic. 9. The medium of claim 8, wherein the generating steps are performed by a single tool. 10. The medium of claim 8, wherein the balancing logic is generated without input from a user of the data conversion system regarding how to balance the data in the source system with data in the target system. 11. The medium of claim 8, wherein the conversion logic converts data from a first format to a second format. 12. The medium of claim 8, wherein the conversion logic renames fields in the data. 13. The medium of claim 8, wherein the conversion logic modifies data types of at least some of the data. 14. The medium of claim 8, wherein the balancing logic compares the data from the source system with the converted data for the target system. 15. In a computer system, a method for converting original data used in a source data processing system into converted data for use in a target data processing system, comprising the steps of: providing a script that specifies how to convert the original data into the converted data; parsing the script with a parser to generate both conversion logic for converting the original data into the converted data and balancing logic for ensuring that the conversion logic properly converted the original data into the converted data; and wherein the conversion logic and the balancing logic comprise computer instructions and wherein the balancing logic is automatically generated by the parser based on the conversion logic. 16. The method of claim 15, wherein the computer instructions are in a high level programming language. 17. The method of claim 15, wherein the script is written in a scripting language specifically designed for data conversion. 18. The method of claim 15, wherein the balancing logic compares the original data with the converted data. opment, author: Ma et al, ACM, 1980.