Google Inc. is developing a home-entertainment system that streams music wirelessly throughout the home and would be marketed under the company's own brand, according to people briefed on the company's plans.

The effort marks a sharp shift in strategy for Google, which for the first would time would design and market consumer electronic devices under its name. The company has mainly focused on developing the Android operating system that powers devices such as smartphones, tablets and televisions. It has also allowed other companies to build and brand the hardware that uses it.

The new Android device, along with Google's pending purchase of device maker Motorola Mobility Holdings Inc., also ups the ante in its ongoing tussle with rival Apple Inc., which also controls both the software and hardware process.

Google competes with Apple in the mobile market where the share of Android-powered phones grew rapidly to overtake that of iPhones last year, according to some estimates. Apple recently stepped onto Google's Web search turf by launching Siri, a voice-activated search feature on its latest iPhone. And Google over the past year has worked to try to catch up to Apple in other areas such as selling digital music, movies and e-books directly to consumers.

Google's entertainment device, in development for several years, is expected to be unveiled later this year, people familiar with the matter said.

It's unclear which retailers would sell the entertainment device, which would stream music from Google's online music-storage service and pipe it wirelessly to Google-designed speakers or other Web-connected devices in people's homes, according to these people. In the future, such a device could potentially stream other forms of digital media such as video, one of these people said.

Consumers would operate the Google system using a smartphone or tablet, they said. It's unclear whether the devices would have to be powered by Android.

A Google spokesman declined to comment.

Google currently offers and other digital media for sale online through Android Market, which rivals Apple's iTunes store.

Google has already been moving to take Android from mobile devices into people's living rooms. The company has worked with television makers to incorporate the operating system under the moniker Google TV, which lets people use their TVs to browse the Web for video content, among other things. But the technology, which has been adopted by companies such as Samsung Electronics Co. and Sony Corp., has been slow to gain traction with consumers.

One person familiar with the matter said Google was hoping to offer the entertainment system, which would bring a new revenuestream to the company, at more-affordable prices than a similar device made by Sonos Inc., which focuses exclusively on music.

The market for home-audio hardware, including basics like stereos and more advanced gadgets like the Sonos music-streaming system is worth around $8 billion a year, world-wide, according to an estimate from Sonos co-founder Tom Cullen, who adds that his company's annual sales last year totaled about $200 million. 'I'd be stunned if they actually thought it was worth it, because it's peanuts for them,' Mr. Cullen said. Google generated about $38 billion in revenue last year.

One person familiar with Google's plans said the company hopes to increase the size of that market by selling products at lower price points.

The initiative, however, could bring Google closer to being in competition with hardware companies that use Android and are commonly seen as partners for the company.

Partnerships between Google and device makers have made Android the No.1 operating system in smartphones in the U.S. and helped Google to extend its Web-search engine and other applications into devices beyond PCs. Google doesn't generate any revenue from sales of the devices.

Google's Android unit is led by Andy Rubin, who once ran a company called Danger that designed handsets, including the Sidekick, which Google co-founders Larry Page and Sergey Brin have said they admired. Over the past year or so Mr. Rubin hired some of his former colleagues at Danger, including Matt Hershenson and Joe Britt, to lead Android's hardware unit.

At a conference last year, Mr. Britt previewed two home-entertainment devices that are related to the product Google is expected to sell this year. Mr. Britt called them 'Tungsten' devices and said one of them could be controlled by an Android tablet and used to stream music and to act as a 'bridge' to connect with other home appliances and devices.

'Think about your home as a network of accessories and think of Android as the operating system for your home, a vision called 'Android @Home,'' Mr. Britt said at the conference. He didn't say the company would sell the device.

The company continues to work closely with device makers. For every updated release of its Android operating system, for example, Google chooses one hardwarepartner and helps it design a 'Nexus' device to showcase the operating system's newest capabilities. Most recently, Google launched the Galaxy Nexus smartphone, made by Samsung.

Google in 2010 tried to sell the first Nexus device, called Nexus One and built by HTC Corp., directly to consumers through its website. The company discontinued the effort several months later.

Google's new device would mark the first time it has directly overseen the manufacturing process, working with overseashardware suppliers and selling devices to consumers.

Google has increasingly expressed interest in allowing Android devices such as a smartphone to control appliances and other home devices, including lights or heating systems.

AMIR EFRATI / ETHAN SMITH

• system [´sistəm] n.系统，体系，制度 (初中英语单词)
• mainly [´meinli] ad.主要地；大体上 (初中英语单词)
• device [di´vais] n.装置；器具；策略 (初中英语单词)
• entertainment [,entə´teinmənt] n.招(款)待；联欢会 (初中英语单词)
• stream [stri:m] n.河 vi.流出；飘扬 (初中英语单词)
• operate [´ɔpəreit] v.(使)运转；操作；经营 (初中英语单词)
• advanced [əd´vɑ:nst] a.先进的；高级的 (初中英语单词)
• estimate [´estimət, ´estimeit] n.估计；评价 vt.估价 (初中英语单词)
• annual [´ænjuəl] a.每年的 n.年刊 (初中英语单词)
• actually [´æktʃuəli] ad.事实上；实际上 (初中英语单词)
• competition [,kɔmpi´tiʃən] n.比赛；竞争 (初中英语单词)
• conference [´kɔnfərəns] n.讨论(会)；会谈 (初中英语单词)
• vision [´viʒən] n.视觉；想象力；幻影 (初中英语单词)
• release [ri´li:s] vt&n.释放；放松；赦免 (初中英语单词)
• partner [´pɑ:tnə] n.伙伴 v.同....合作 (初中英语单词)
• working [´wə:kiŋ] a.工人的；劳动的 (初中英语单词)
• consumer [kən´sju:mə] n.消费者；用户 (高中英语单词)
• overtake [,əuvə´teik] vt.追上；赶上 (高中英语单词)
• tablet [´tæblit] n.碑；牌；匾额 (高中英语单词)
• incorporate [in´kɔ:pəreit] v.结合 a.合并的 (高中英语单词)
• revenue [´revinju:] n.税收；收入 (高中英语单词)
• billion [´biljən] num.万亿 (高中英语单词)
• initiative [i´niʃiətiv] n.主动权；首创精神 (高中英语单词)
• commonly [´kɔmənli] ad.一般地；通常 (高中英语单词)
• related [ri´leitid] a.叙述的；有联系的 (高中英语单词)
• hardware [´hɑ:dweə] n.五金器皿 (英语四级单词)
• exclusively [ik´sklu:sivli] ad.独有地；排外地 (英语四级单词)
• generate [´dʒenəreit] vt.创造；发生；引起 (英语四级单词)
• network [´netwə:k] n.网状物 vt.联播 (英语四级单词)
• increasingly [in´kri:siŋli] ad.日益，愈加 (英语四级单词)
• strategy [´strætidʒi] n.兵法；战略 (英语六级单词)
• pending [´pendiŋ] a.迫近的；悬而未决的 (英语六级单词)
• spokesman [´spəuksmən] n.发言人 (英语六级单词)
• browse [brauz] vi.浏览 n.放牧 (英语六级单词)
• overseas [,əuvə´si:z] ad.(向)海外 a.海外的 (英语六级单词)