Mar 2026【隨筆】Clone a Meta Ray-ban Display glasses application|藍芽 L2CAP CoC 極致低延遲架構優化:實現 720p 智慧眼鏡流暢串流 👓(LIVE DEMO)

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最近在做一些實驗性質的東西,記得去年短暫玩過 2023 年底上市的第二代 Ray-Ban Meta 智能眼鏡,雖然它主要還是依賴智慧型手機作為算力中心,但我們對它所使用的串流技術很感興趣,因為聽說他們是用藍芽做串流。 去年曾經有同事隨口問我:「我們的眼鏡做到跟他們一樣你覺得有可能嗎?」,因為我知道我們的硬體規格跟人家的相比並非等號,加上當時有其他事情在搞,所以隨口開玩笑回說:“可是聽說 Meta 有200個人在搞那個眼鏡捏(雖然不知道他們負責搞應用的有幾人),啊我如果一個人可以幹贏他們200人,那我還在這幹嘛???(笑)” 也記得更久以前,當我們還在研究那個眼鏡時,常聽到像是:『 他們不知道用了什麼黑科技 』,這類沒有建設性、不應該從 RD 嘴裡說出來的話,而我也是不以為然。坦白講,以前每次只要聽到某SW嘴砲經理(暫且以H君稱之),沒事就把『 黑科技 』三個字掛在嘴上,當做無知的遮羞布,我就會感到倒胃口!同樣身為RD,我只覺得  Shame on you!(打嘴炮、作秀搶風頭、噁心帶風向、搞政治操作、把別人做事的成果搶去幫自己抬轎、有鍋直接推給下屬扛、散佈同事私生活謠言,還有職場霸凌,這些你他媽都頂級專業戶,除此之外沒啥洨用了!) 一件理論上可以做到的事情,外行人的認知被信息差,不懂加上沒實作能力去驗證,就什麼都變成黑科技了(多黑?比巴西黑鮑魚還黑嗎?)。反重力技術說不定也非啥黑科技,只是政府不讓你普通老百姓了解罷了。 Ray-ban Meta 的黑科技,講白了就是人家拉個百人團隊在搞那支眼鏡,然後把軟體技能和硬體規格點滿,再加上極致優化後的成果罷了! 當時知道 Ray-Ban Meta 的智慧眼鏡有塞入一個強大的 WiFi 6 晶片在裡面,一開始我猜測會不會有可能是透過 WiFi P2P 或 WiFi SoftAP 的方式去做串流(確實 Meta 的智能眼鏡,在同步媒體時,會強制要求開啟手機的 WiFi 開關,所以媒體同步應該是靠 WiFi 通道做的),而去年初我也快速做了一個WiFi Direct 架構來做 POC,確實傳輸效率非常快,幾百 MB 的大檔幾乎秒級傳完,從眼鏡端將媒體串流到手機端更是不用說的順暢,而且當時我們的媒體串流還是以未經編碼的方式傳透過 Socket 直接傳輸的(這表示傳輸時所需的頻寬會更大,功耗據說也較大)。 後來因為 ...

Planning on taking the Yari-Hotaka traverse and Tateyama/Tsurugi-dake Circuit Trek in the Northern Japan Alps


The Japan Alps consist of three volcanic ridges that run from north to south through the central and widest part of Honshu. The home of numerous hiking areas and ski resorts, and centered around Nagano, the Japan Alps are named after the famous European mountain range because they both feature rugged glacier-carved slopes and numerous peaks over 3,000 meter.

With the exception of Mt. Fuji, which is further east, the highest mountains in Japan are located in the Japan Alps. Numerous streams running through the plateaus and between the mountains have carved out lovely gorges and ravines. Thick-wooded forests occupy the lower slopes, and of alpine flora and rugged rocky walls occupy the higher slopes.

The Hida Mountains, or Northern Alps, is a Japanese mountain range which stretches through Nagano, Toyama and Gifu prefectures. The Northern Japanese Alps is a major mountain chain slicing through the heart of Japan north to south. A number of Japan's most awesome peaks lie in this popular mountainous region, which is loved by climbers. Several 3,000-meter-high rocky peaks rise from the Hotaka Mountains as if taking turns piercing the sky. The two most popular climbing mountains, Mt. Yari and Mt. Hotaka are difficult to climb. In the past 30 years over 500 climbers have died trying to reach their summits. Yari means "spear" in Japanese and the dangerous hike to top of this mountain takes three days. The ascent of Hotaka, the third highest mountain in Japan, isn't as difficult. At the top you can often see eagles riding the thermals. Still people have died climbing it. The route from the Hotaka Mountains to Mt. Yari is revered as one of the most difficult traverse routes in Japan. 


The Kita Alps are well-travelled in the summer months and series of comfortable mountain huts, similar to those in the Alps, are well-spaced, staffed, and equiped to accomodate the throngs of Japanese hikers during the peak summer months. Mt. Oku-Hotaka (3,190 meters) , the highest of the the group, sits at the south end of a knife-ridge which connects to the famous Yarigatake (3,180 meters) mountain, aprx. 6 miles to the north. Other prominent peaks in the Hotaka massive are: Mae-Hotaka (3,090 meters), Nishi-Hotaka (2,908 meters) Kita-Hotaka (3,106 meters), and Karasawa Dake (3,110 meters). 

The Japan Alps are truly remarkable and beautiful and a developed infrastructure allows easy access. At the base of the Hotaka massive, sits the resort town of Kamikochi in the Azusa River valley. The peaks are the centerpiece of the Chubu Sangaku National Park. Alpinists relish the challenge of ascending the mountains from the western slope, which is a sheer, massive rock face. Over the years, the steep cliffs have claimed the lives of many mountaineers.

At a height of 3,180 meters, Mt. Yari (Yarigatake) has a sharply pointed summit that is shaped like a pyramid and is located in the northernmost of the group of the rocky peaks. Mt. Yari is Japan's fifth-highest peak, and called“the Japanese Matterhorn”because of its shape. Mt. Yari is so popular that it is a summit that nearly everyone aspires to climb at least once. During the summer climbing season, alpinists form a long queue waiting for their turn to summit Mt. Yari. Climbing Mt. Yari and Mt. Hotaka is very popular among Japanese and foreign climbers and was one of my dreams.


Tateyama-Kurobe Alpine Route is 90 kilometer route that is broken into nine sections and includes rides on cable railways, a highland bus, a cable car, and a trolley bus. It starts in Toyama and finished in Shinano-omachi (It's also possible to do trip in the reverse direction), and stops at Kurobe Dam. The entire journey costs about ¥11,000.

Tateyama Mountain is considers one of Japan's three holiest mountains along with Mt. Fuji and Mt. Haku and is comprised of three peaks: Oyama, Onanjiyama, and Fujinooritate. The highest is 9,892 feet. Climbing the mountain has traditionally been regarded as means of purifying the soul. For many years it was off limits to women and was climbed by 15-year-old boys to prove their manhood. 

Among the mountains of the Japanese Alps, Tsurugi-dake is maybe the most famous among experienced hikers. The reason for this is the rather difficult and exposed ascent that is possible for the average hiker only with the help of many chains, nails etc. The normal approach to Tsurugi-dake is to take the train, cable car and bus route from Toyama to Murodo. From there it is a few hours hike to the base of Tsurugi-dake. On the way, you pass the sulfuric springs that feed onsen in many of the huts in the area.

Tsurugi-dake is located in the eastern area of Toyama Prefecture, Japan. It is one of the tallest peak in the Hida Mountains at 2,999M. Based on peakery data, it ranks as the 1st highest mountain in Toyama and the 17th highest mountain in Japan. It is one of the 100 Famous Japanese Mountains, and is called "the most dangerous mountain" climbable. Before attempting this mountain make sure you have some experience and take appropriate safety equipment. Having said that the trail up to the summit is steep but good fun and you get a real sense of accomplishment when you make it to the top.

If you have only time for one area of the outdoors to explore during your stay in this country, you can’t go wrong by choosing one of the many choices the Northern Alps has to offer. I'm planning on taking the Yari-Hotaka traverse and Tateyama/Tsurugi-dake Circuit Trek in the Kita Alps this summer, it's gonna be exciting!!.


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