This week, seven media stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

This week, Knology (KNOL) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). Knology is a fully integrated provider of video, voice and advanced communications services to residential customers in the southeastern United States. In Portfolio Grader’s specific subcategories of Equity and Margin Growth, KNOL also gets A’s. For more information, get Portfolio Grader’s complete analysis of KNOL stock.

Dex One (DEXO) is bumping up its rating from a C (“hold”) to a B (“buy”) this week. Dex One is a marketing solutions company that offers various solutions to promote businesses on the Internet through its proprietary search engine marketing product, DexNet. For more information, get Portfolio Grader’s complete analysis of DEXO stock.

Outdoor Channel Holdings (OUTD) is seeing ratings go up from a C last week to a B this week. Outdoor Channel Holdings is the principal owner of The Outdoor Channel, a national television network. For more information, get Portfolio Grader’s complete analysis of OUTD stock.

This is a strong week for Digital Generation, Inc. (DGIT). The company’s rating climbs to B from the previous week’s C. Digital Generation operates a nationwide network that links advertisers and advertising agencies with radio stations and television stations across the United States and Canada. For more information, get Portfolio Grader’s complete analysis of DGIT stock.

The rating of Cinemark Holdings, Inc. (CNK) moves up this week, rising from a B to an A. Cinemark is engaged in the motion picture exhibition industry, and own theatres internationally. For more information, get Portfolio Grader’s complete analysis of CNK stock.

This week, Hong Kong Television Network Ltd. Sponsored ADR’s (HKTV) ratings are up from a C last week to a B. Hong Kong Television Network engages in the provision of multimedia production and contents distribution business, and other multimedia related activities in Hong Kong. Shares of the stock have been trading at an exceptionally rapid pace, up twofold from the week prior. For more information, get Portfolio Grader’s complete analysis of HKTV stock.

This week, John Wiley & Sons, Inc. Class A (JW.A) pushes up from a C to a B rating. John Wiley & Sons publishes print and electronic products. For more information, get Portfolio Grader’s complete analysis of JW.A stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.