Vantrix, a Montreal, Canada company that helps publishers deliver video and other data across multiple handsets via various carriers, said it has raised $12 million in a second round of financing.

An increasing number of companies are focused on the thorny problem of video and audio transmission across today’s fragmented mobile landscape — characterized by hundreds of different phones and protocols.

Competitors include Quickplay and Dynetic.

Vantrix says it has customers like AT&T, Orange, and ABC News. It is active in the U.S. and Asia, but is seeing significant demand for its services in India, it says.

In a statement, it said Chicago’s JK&B Capital led the round, and existing investors SummerHill Venture Partners (the venture arm of Bell Canada Enterprises), Entrepia Ventures, BDC Venture Capital, and Innovacom (the venture arm of France Telecom), participated.

It has now raised a total of $24.4 million.

In the statement, Manish Jha, CEO of Vantrix said: “Delivering rich media on mobile phones should not be hindered by obstacles such as the fragmentation of devices, screen sizes, codec types, content formats, media player characteristics and network incompatibility issues. Vantrix helps content providers and carriers worldwide overcome these barriers to deliver ubiquitous and compelling new mobile services to consumers.”