Need an advice on research topic
You're probably aiming too high: a research topic doesn't have to lead to a major breakthrough, and very often it's impossible to know what it leads to before doing it. A Master thesis is not very long so you need to find a research topic which is feasible within the time frame. A common mistake by Master students is to spend too much time on implementation, then botching the analysis and/or writing a poor quality dissertation because there's not enough time left.


Discuss with your advisor, they have the experience and they know what is a good topic.
Read a few random papers in your domain. Why? Because if you read only the top quality papers (yes, of course these are important to read), you can get the impression that you need to achieve the same level of quality. But that's not the case: these top quality papers are 1 in a million and are often done by people who have years of experience behind them. A "regular" research contribution is often just a small improvement or a decent analysis on a specific problem.
Typical process: just pick a general topic/problem you're interested in, then study the state of the art thoroughly (write your state of the art section at this stage), reproduce a few experiments and analyze the results: what can be observed? what are the limitations? what would be a reasonable idea to overcome one of these limitations? Then you implement and evaluate this idea.


Keep in mind that in research what matters is not the complexity of the topic or even the performance, it's the rationale and the method (and of course originality of the work, but even that doesn't matter that much at Master level).